Best Synthetic Insulated Jackets of 2023-2024
WARM-WHEN-WET SYNTHETIC PUFFY JACKETS for Men & Women
September 11th, 2023
A synthetic insulated jacket stays warm-when-wet on a hiking day of rain, snow, and hail. Photo by Emily Haas
If you plan to be outdoors during the fall, winter, and spring seasons, a lightweight puffy jacket is essential to a good layering system — especially if you’re somewhere wet. We’ve tested and reviewed the best down jackets for men and women, but here we focus on down alternatives, searching for the best synthetic insulated jacket options that are warm-when-wet and suitable for vegans.
A good mid layer needs to feel light, retain some warming insulation value when wet, be comfortable, withstand outdoor pursuits, and perform similarly to down. To find the best synthetic insulated jackets, we review 18 of the most popular models.
We tested the top contenders for months in diverse conditions — from wet commutes in the Pacific Northwest to mountain adventures in cold weather to thru-hiking in Arizona.
I’m a former Wilderness Guide who spent four winter seasons guiding teenagers in Central Oregon and summers guiding clients around glaciers in Alaska. As a result, I became intimately acquainted with cold-weather gear, tips and tricks, and how to teach finicky teens (and vacationing adults!) how to be comfortable in cold weather.
After putting these jackets through the wringer, we’ve chosen the six best synthetic puffy jackets for various lifestyles and climates while also sorting models by fill type, weight, cost, and warranty.
Looking for a down puffy jacket? See our guide to The Best Down Jackets
Not sure? Read Should I choose a down or synthetic jacket?
This story may contain affiliate links, which help fund our website. When you click on the links to purchase gear, we may get a commission. This allows us to create reader-supported objective gear reviews without costing you an extra cent. Thank you for supporting our work and mission of outdoor coverage for every body! Learn more.
Comparison Tables
Women’s Synthetic Jacket Comparison Table
| WOMEN'S JACKET | TREELINE AWARD | MSRP | SHELL MATERIAL | DWR? (Y/N) | WEIGHT (HOODIE) | INSULATION | # OF POCKETS | HOOD OPTION? | SIZES |
|---|---|---|---|---|---|---|---|---|---|
| Patagonia Micro Puff | Best Overall Read why |
$329 | 10D ripstop nylon | Y | 9.0 oz | PlumaFill 100% recycled | 4 | Y | XXS-XL |
| Arc'teryx Cerium LT | Best Hybrid Read why |
$400 | Arato 15 nylon | Y | 10.2 oz | 850 fill down + Coreloft | 3 | Y | XXS-XXL |
| L.L.Bean PrimaLoft Packaway | Best Affordable Read why |
$199 | 100% recycled polyester | N | 14 oz | PrimaLoft Cross Core, Gold | 4 | Y | XXS-XL (also available in petite) |
| Patagonia DAS Parka | Best Warmth Read why |
$449 | 10D Pertex Quantum Pro 100% recycled nylon ripstop with a PU dry coating and a PFC-free DWR finish | Y | 18.4 oz | PrimaLoft Gold Eco | 5 | Y helmet compatible | XXS-XL |
| Patagonia Nano-Air | Best Breathable Read why |
$329 | 100% polyester | Y (PFC free) | 12.4 oz | FullRange (93% recycled polyester, 7% polyester) | 3 | Y | XXS-XL |
* Prices reflect MSRP and are subject to change. We note any discounts we see on our Deals page, which is updated daily.
Men’s Synthetic Jacket Comparison Table
| MEN'S JACKET | TREELINE AWARD | MSRP | SHELL MATERIAL | DWR? (Y/N) | WEIGHT (HOODIE) | FILL | # OF POCKETS | HOOD OPTION? | SIZES |
|---|---|---|---|---|---|---|---|---|---|
| Patagonia Micro Puff | Best Overall Read why |
$329 | Netplus (10D 100% recycled nylon ripstop from fishing nets), PFC-free DWR finish | Y | 10.5 oz | PlumaFill 100% recycled | 4 | Y | S-XXL |
| Arc'teryx Cerium | Best Hybrid Read why |
$400 | Arato 15 Nylon | Y | 11.8 oz | 850 fill down + Coreloft | 3 | Y | XS-XXL |
| L.L.Bean PrimaLoft Packaway | Best Affordable Read why |
$199 | 100% recycled polyester | N | 14 oz | PrimaLoft Cross Core, Gold | 4 | Y | S-XXXL (also available in tall) |
| Patagonia DAS Parka | Best Warmth Read why |
$449 | [face fabric] Pertex Endurance (100% nylon), PU dry coating, DWR finish, [lining] Pertex Quantum (100% nylon), DWR finish | Y | 19.6 oz | PrimaLoft Gold Eco | 5 | Y helmet compatible | XS-XXL |
| Patagonia Nano-Air | Best Breathable Read why |
$329 | 100% recycled polyester air permeable shadow ripstop, DWR finish | Y (PFC free) | 14.1 oz | 100% polyester | 3 | Y | XS-XXL |
* Prices reflect MSRP and are subject to change. We note any discounts we see on our Deals page, which is updated daily.
For more of our most popular gear recommendations, see our most popular Gear Guide stories:
The Best Synthetic Insulated Jackets
BEST Overall SYNTHETIC INSULATED JACKET:
PATAGONIA MICRO PUFF HOODY
Shell material: 10D ripstop nylon Netplus
Total weight: 9.0 oz (women), 10.5 oz (men)
Fill Type: PlumaFill 65-g 100% recycled
Number of Pockets: 2 zippered hand, 2 internal
Hoodless jacket version: Yes (men’s and women’s)
Vest version: No (discontinued)
Sizes: XS-XXL (men’s), XXS-XL (women’s)
Warranty: Ironclad Guarantee, they will repair, refund, or exchange any item, for any reason.
What we liked: Packable to a low volume, durable, great insulation to weight ratio, articulates well, functional pockets in women’s version, and exceptional warranty
What we didn't like: Not the most budget friendly, but a fair value
We think the Patagonia Micro Puff Hoody is the best synthetic insulated jacket for most people because it is light, packable, stylish, and warm for its weight. It has a warmth-to-weight ratio similar to down—appealing to those who want a technical jacket.
The warmth of the Micro Puff far exceeds that of its popular sibling, the popular Patagonia Nano Puff (more on that jacket later). We think the Micro Puff is the best overall synthetic insulated jacket because it has all the advantages of the Nano Puff but with more warmth: it’s stylish, packable, and has enough features to be convenient for everyday use as well as technical ultralight adventures.
PATAGONIA MICRO PUFF HOODY
MEN’S
WOMEN’S
The Patagonia Micro Puff is a lightweight jacket that is warm even in the Sierra in October. Photo by Liz Thomas.
We liked this jacket so much that we wrote an in-depth, long-term single-product review.
Incredible warmth for its weight
In our article What to wear hiking in Fall story, we wrote about the incredible warmth-to-weight ratio of the Patagonia Micro Puff jacket. Patagonia uses its proprietary PlumaFill Insulation, which is designed to mimic the shape of down plumules. That’s why Patagonia says the Micro Puff is “the best warmth for weight of any jacket we’ve ever built.”
For an extra ounce of weight, you can get the hooded version and bump up the warmth factor. We like the elastic cuff, hood, and hem on the Micro Puff because they reduce weight, while still keeping warmth in.
Treeline Review writer Mike Unger wearing the Patagonia Micropuff on a cold, snowy day in the Columbia River Gorge. Notice the diamond quilting pattern on the sleeves and the horizontal quilting on the torso. Photo by Naomi Hudetz.
This is one of two jackets on our list that has four pockets, two of which are internal stash pockets. We like internal pockets because they make it easier to keep electronics from freezing when the temperature drops. Exposure to cold can permanently reduce phone battery life and can also reduce your phone's battery life in the short term. This can potentially be dangerous to adventurers who use their phone to navigate, and annoying for anyone who takes photos or listens to music on their phone. Keeping a phone in your pocket is a good way to protect your phone's battery.
The high-end insulation on the Micro Puff has some 4-way stretch, so it moves with you during activities. Photo by Liz Thomas
Sizes and fit
Treeline’s editor Naomi Hudetz used this jacket on an 800-mile long thru hike of the Arizona Trail and was impressed by the amount of warmth it provided compared with its weight. She appreciated the long torso length which meant it never bunched up under the hip belt of her backpack. She also really liked the curved shoulder yoke design which gives great freedom of movement in the arms and shoulders.
Patagonia’s sizing on this jacket runs a little narrower than their popular Down Sweater, but is still not aggressively athletic, making it a better fit for varying body types. Their size range is better than average, with women’s running from XXS-XL and men’s running from XS-XXL.
Interior drop-in pockets of the women’s medium (left) and men’s large (right) Micro Puff jackets. The pockets are large enough for your phone, and then some. Elastic at the top keeps contents inside. Photo courtesy Naomi Hudetz.
Pockets
Finally...a lightweight women’s jacket with functional pockets, including an internal chest pocket!! While men's lightweight jackets often have pockets, it's a rarity with women's. We appreciated being able to have a top-of-the-line jacket available that offered us pockets.
As we mention above in the warmth section, pockets are also a good way to protect your phone's battery from getting exposed to freezing temperatures.
Elasticized hems keep your cuffs from getting in the way when doing camp chores. Photo by Liz Thomas.
Sustainability and Fair Trade Sewn
Patagonia’s products are bluesign® certified, meaning they reduce the amount and toxicity of chemicals they use. The Micro Puff is also Fair Trade Certified Sewn. Another way Patagonia reduces their impact is through their incredible warranty. Patagonia has what they call their Ironclad Guarantee. They will repair, refund, or exchange any item, for any reason, no matter how long you’ve had it, or how much abuse you’ve put it through.
Another thing we like about this jacket is that Patagonia allows you to trade it in to their Worn Wear used gear portion of the website to receive store credit. So if your body changes over the years or you get into different outdoor activities, it will stay out of the landfill.
Flaws but not dealbreakers
A few users mentioned that the elastic waistband can ride up and that the shell fabric tears easily. This is not surprising and is generally true of any 10 denier fabric. Extra care must be taken when dealing with lightweight gear.
Who else likes it
The Micro Puff is not only a top jacket to our testers, but is a favorite of Outdoor Gear Lab, Gear Patrol, and Big Outside. It has 4.5 out of 5 stars in both the men’s and women’s versions on Patagonia’s website, encompassing more than 400 reviews. It has similar star ratings on REI, Backcountry, and Amazon.
Value
The Micro Puff is one of the most expensive lightweight insulated jackets on our list, but with such a great warranty you know you’ll get your money’s worth.
BEST SYNTHETIC / DOWN HYBRID INSULATED JACKET: ARC’TERYX CERIUM HOODY
Shell material: Arato 15 Nylon
DWR treatment? Yes
Total weight: 10.2 oz (women), 11 oz (men)
Fill Type: 850 fill down + Coreloft 80 and 100
Number of Pockets: 3
Hoodless jacket version: Yes (men’s and women’s)
Vest version: Yes (men’s and women’s)
Packability options: Stuff pocket
Sizes: XS-XXL (men's), XS-XL (women's)
Warranty: Limited Lifetime: manufacturers defects for reasonable expected lifetime of the product.
What we liked: Smart use of synthetic insulation
What we didn't like: Fits too slim for some body types
To capitalize on the positive aspects of synthetic insulation while still capturing the warmth-to-weight ratio of down, the Arc’teryx Cerium Hoody uses what the company calls “down composite mapping” to create the best hybrid insulated jacket.
Arc’teryx puts synthetic insulation in the areas most likely to get wet like the shoulders, armpit cuffs, and collar. The rest of the jacket is filled with down to maximize insulation.
Since it is both down and synthetic, the Arc'teryx Cerium Hoody also won our award for Best Hybrid Insulated Jacket in our Best Down Jackets guide.
The Arc’teryx Cerium was previously called the Arc’teryx Cerium LT. For 2022/23, Arc’teryx dropped the LT from its name (LT is an abbreviation for “lightweight”). While the Cerium feels like a fairly puffy jacket, it’s still a respectable 10.2 oz for women’s and 11.8 oz for men’s—lighter weight than almost every jacket we tested that wasn’t going for the Ultralight or Thru-hiker category.
ARC’TERYX CERIUM HOODIE
MEN’S
WOMEN’S
Warmth hybrid down synthetic
Over the last few years, we've been a big fan of hybrid down and synthetic jackets. These jackets use a mixture or combination of down and synthetic fill. The concept is to get the best of down and synthetic insulation: down’s lightweight packability, combined with
Hybrid jackets may be great options for folks who want one that will work for various conditions and activities.
the water-resistance and breathability of synthetic.
The best example of the hybrid-down jacket model is the Arc'teryx Cerium. From its attention to detail on the cut and design to its quality of materials and sewing, this is the best synthetic-down jacket we've seen.
Pockets
You can keep your phone or valuables in a hand warmer pocket or an internal zippered pocket.
Similar Arcteryx jackets
We also considered the lightweight Arc’teryx Atom (see The Contenders section). The Cerium is much warmer than the Atom. Customers call it a "camp jacket," whereas the Atom that we recommend is active insulation for activities like alpine climbing.
Fit and sizing
One thing for users to keep in mind is that Arc'teryx jackets generally have a very slim fit that may not work for all body types. The men’s size range is slightly wider than the industry standard, starting at XS and going up to XXL.
Colors
A nice bonus is that Arc'teryx jackets don’t adhere as tightly to stereotypical “men’s“ and “women’s“ colors as many brands do. They provide a wide option of gender-neutral colors in both categories.
BEST Affordable INSULATED JACKET:
L.L.BEAN PrimaLoft PACKAWAY JACKET
Shell material: 100% recycled polyester
Total weight: 14 oz
Fill Type: PrimaLoft Cross Core; PrimaLoft Gold+NASA Aerogel 60g
Number of Pockets: 4; 2 hand, one chest, one internal media w audio port
Hoodless jacket version: Yes (men’s and women’s)
Vest version: Yes (men’s and women’s)
Sizes available: Women’s XXS to 3X (also available in petite); Men’s S to XXL (also available in tall)
Warranty: 100% satisfaction within 1 year and manufacturers defects after 1 year
What we liked: Under the radar performer, inclusive sizing
What we didn't like: Fit is boxy in the torso relative to the sleeve sizing
The L.L. Bean PrimaLoft Packaway Jacket has been the the best budget synthetic jacket for many years running. It's a gold-standard jacket considered by many reviewers to be the best-insulated jacket for the price. We found it incredibly warm — especially for how thin it is. While L.L. Bean is known for casual gear, they’ve snuck in high-end insulation to create a reasonably-priced lightweight, packable, mid-layer jacket or shoulder season outer layer. The L.L. Bean Packaway is a favorite at Switchback Travel. Gear Patrol and considered it an “unassuming winner.”
L.L.BEAN PRIMALOFT PACKAWAY HOODED JACKET
MEN’S
WOMEN’S
The author of this story holding her pet chicken on a cold fall day while wearing the L.L. Bean Packaway. Photo by Emily Haas
Warmth to weight ratio
L.L. Bean has accomplished its incredible warmth by using new insulation from PrimaLoft called PrimaLoft Gold with Cross Core technology.
PrimaLoft Gold is a well-known insulation. The newer CrossCore version of this synthetic insulation uses silica aerogel (the same as that used by NASA) in the fibers. Cross Core is purported to increase warmth by 52% without increasing weight.
According to Snow Industry News, “silica aerogel is composed of more than 95% air and is the lightest solid material known to humankind.”
It’s the same insulation in the Patagonia DAS Parka, which won our award for Best Jacket for Extreme Weather and is twice the price of the L.L. Bean Packaway.
We tested the L.L. Bean Packaway and confirmed what many of the customer reviews said. When we took it out of the package, it didn’t look like it would be very warm because of how thin it was. While testing, we were pleasantly surprised by its warmth. We were toasty warm in 40° weather with just a thin base layer underneath.
Elasticized bottoms hold the jacket in place. Photo by Emily Haas
Pockets
Not only does the L.L. Bean Packaway jacket have the most pockets out of any of our picks (other than the Patagonia Micro Puff, our Best Overall winner), but all 4 pockets are sizeable, including the chest pocket. That means there’s plenty of storage for anything from phones to gloves to snacks. The internal pocket even has an audio port. Even the handwarmer pockets have zippers!
Fit and sizing
We also liked that the jacket comes in women’s regular (XXS-XL), petite (XXS-XL), and plus (1X-3X) sizing, and men’s regular (S-XXL) and tall (M-XXL) sizing. For those of you counting, that’s 15 women’s sizes and 9 men’s sizes! Both women’s and men’s come in 8 different colors.
Sizing this jacket right can be a challenge. Our tester generally wears a women’s large. With the Packaway jacket, the size large was barely long enough in the arms and incredibly bulky in the body. We suspect it is designed this way to use as a layering piece, as there is plenty of room for extra layers underneath. Everyday users in the reviews also raised this issue.
Others who like it
The L.L. Bean Packaway is a favorite at Switchback Travel and Gear Patrol calls it an “unassuming winner.”
Warranty
L.L. Bean has a 100% satisfaction guarantee within one year of purchase. After one year, they cover manufacturer defects only. If you’re unhappy with your sizing or how it looks on you, it’s easy to exchange or return.
BEST Synthetic JACKET FOR EXTREME WEATHER:
Patagonia DAS Parka
Shell material: 10D Pertex Quantum Pro
DWR treatment? Yes
Total weight: 18.4 oz (women's), 19.6 oz (men's)
Fill Type: 133-g PrimaLoft Gold Insulation Eco
Number of Pockets: 5
Hoodless jacket version: No
Vest version: No
Packability options: Stuff Pocket
Sizes: XXS-XL (women's), XS-XXL (men's)
Warranty: Ironclad Guarantee
What we liked: Premium fabrics, warmest jacket we tested, durable
What we didn't like: We would love to see extended sizes
Patagonia’s reputation for making consistently high-quality, reliable gear extends to our winner for best synthetic jacket for extreme cold, the Patagonia DAS Parka.
It's marketed as a belay jacket — a category designed for extreme warmth in alpine conditions. A belay parka is designed for minimal movement (after all, while belaying, you are sitting or standing while assisting your climbing partner). With that goal in mind, it is not surprising the DAS Parka is the warmest jacket we tested.
The DAS Parka is a weatherproof cold weather jacket for times when you won’t be moving much — everything from belaying to watching kids play. The author wears this jacket without a shell in the pouring rain in Portland and has never gotten wet — something she wouldn’t do with down–or pretty much any other synthetic jacket. If you’re looking for a foul weather puffy that can stand up to pretty much anything, the Patagonia DAS Parka is the way to go.
PATAGONIA DAS PARKA
MEN’S
WOMEN’S
The author in the DAS Parka in a snowstorm. Photo by Adam Leckie.
WARMTH TO WEIGHT RATIO
Since climbers usually don't want to carry much weight up the side of a rock or mountain, it's got a great warmth-to-weight ratio, too.
This hooded jacket has the most insulation of any we picked, at 133g/m2 of Primaloft Gold Insulation Eco. PLUS, they added 40g/m2 of Cross Core to key areas. The Cross Core is made with silica aerogel (used by NASA) and is ridiculously light and warm. This is one of the reasons that the warmest synthetic jacket we recommend only weighs 18.4 oz in a women's medium.
Materials
Patagonia also uses a very lightweight 10d Pertex Quantum Pro shell. This material is more durable than most face fabrics with such a low denier. Plus, they add a PU (polyurethane) dry coating to increase the abrasion resistance even more.
Fit and sizing
Practically speaking, the cut of DAS Parka is roomy enough for layering and extends over the hips, which is great for folks with bigger hips, or for use while wearing a climbing harness. The two-way zipper also makes it easy to take your harness off or on without losing a bunch of heat by fully unzipping the jacket.
We wish Patagonia offered extended sizing on the DAS Parka past Women’s XL and Men’s XXL.
Pockets
The DAS Parka has 5 roomy pockets; two inside and two outside. Plus, it has a chest pocket, even on the women’s version (this is a rarity in outdoor apparel). One customer review stated that the inner pockets are so big they put their Nalgene in the pocket to keep the Nalgene from freezing.
The Patagonia DAS Parka is a weatherproof cold weather jacket. Photo by Adam Leckie.
Features
There are thumb loops built into the elastic of the cuffs, which keeps the cuff from gapping when wearing gloves. The helmet-compatible hood is large enough to fit almost any hairstyle but easily cinches down to keep out drafts.
Trade in and warranty
Another thing we like about this jacket is that Patagonia allows you to trade it into their Worn Wear used gear portion of the website to receive store credit. So if your body changes over the years or you get into different outdoor activities, it will stay out of the landfill.
Value for the price
With everything we like about this jacket, what's the catch?
It’s expensive. However, the price is comparable with other belay jackets. The price is also comparable with high-end high fill-power down jackets.
Who else likes it
The DAS gets nothing but good reviews from professional and customer reviews alike. Several reviewers on Patagonia’s site had owned their DAS Parka for decades and only recently replaced it. All customer reviews we found were 5-star — except one 4 star review. That reviewer still loved it and mentioned no negatives.
DAS Parka vs DAS Light Hoodie
It's worth noting that Patagonia also makes a DAS Light Hoodie, which has a confusingly similar name and is less warm. It uses Plumafill instead of PrimaLoft Gold Insulation Eco and doesn't have extra insulation at the core. It's also about half the weight at 9.7 oz for a women's medium. It's designed as as lightweight belay hoodie for less extreme cold conditions.
BEST BREATHABLE JACKET: PATAGONIA NANO-AIR Hoody
Shell material: 1.7 oz 100% polyester with 4-way mechanical stretch
DWR treatment? Yes, PFC-free
Total weight: 10.2 oz (women's), 12.2 oz (men's)
Fill Type: 60-g FullRange 100% polyester with four way stretch
Number of Pockets: 3
Hoodless jacket version: Yes (men’s and women’s)
Vest version: Yes (men’s and women’s)
Sizes Available: XS-XXL (men's), XXS-XL (women's)
Warranty: Ironclad Guarantee.
What we liked: Highest scoring breathability for active wear
What we didn't like: Slim fit excludes some body types
For several years, the Patagonia Nano-Air has been our go-to gold standard active insulation jacket for its remarkable breathability.
There’s a lot to love about the Nano-Air, and it’s been our favorite for many years. The slight stretch combined with breathability makes it a great choice for active insulation. It’s a favorite of Senior Editor Brandon Lampley in his Bike Touring Packing List, and he’s used it on multiple cross-country bike tours as well as climbing trips and mountaineering trips the world over.
Patagonia has updated the Nano-Air to be more durable, addressing an issue in a previous model with pilling. The quilted panels have been replaced with smooth fabric overall, giving a more streamlined look. They’ve eliminated the hem cinch, instead opting for a stretchy fabric at the hem.
PATAGONIA NANO-AIR HOODY
MEN’S
WOMEN’S
Chopping wood or other high output aerobic activities benefit from highly breathable synthetic insulation. Photo by Adam Leckie
Warmth and materials
As Treeline Review editor Brandon Lampley says, "The Patagonia Nano-Air is the only puffy jacket I’ve worn that moves sweat and moisture fast enough to wear during cold weather aerobic exercise, like bike touring. ’ve found it dries off my sweat and moves enough moisture to be fine ski touring in -5 F degree weather." He also says cold weather cycling "would be right in its wheelhouse. "
The Patagonia Nano-Air is made of 100% recycled polyester ripstop shell and 60-g FullRange insulation with air permeability of 35 CMF. The FullRange is made of polyester, 93% which is recycled.
Treeline Review editor Brandon Lampley bike touring across the country in October in the vest version of the Patagonia Nano Air. Photo courtesy Brandon Lampley.
Mobility
As you'd expect with the name FullRange in the name of the insulation, the Nano-Air is made for mobility and stretchiness. It also sues strategically-placed quilting and smart diagonal stitching so you can move more easily.
Unlike a lot of synthetic jackets, it's designed to be as low-bulk as possible.
Fit and sizing
The Nano-Air has a slimmer fit than most synthetic jackets. That's a negative, in our opinion, because it makes layering under it difficult and excludes certain body types from using this jacket.
However, cyclists or alpine climbers that match that body type may appreciate the closer-to-skin fit that keeps in warmth and reduces weight. We suspect they made the change because the slim fit allows the Nano-Air to be used as a mid layer under a ski jacket.
Nano-Air vs Nano-Air Light Hybrid
The men's and women's Nano-Air Light Hybrid is a lighter weight version of the Nano-Air Hoodie that uses R1 Air Knit Fleece and a lighter weight insulation. The Nano-Air Hoodie uses 60-g FullRange insulation whereas the Nano-Air Light uses 40-g FullRange. The Nano-Air Light also cuts some weight by using R1 Air Knit fleece on the backs of the arms, sides, and lower back–all places where you may appreciate more mobility and won't miss the insulation. The Nano-Air Hoodie is 14.15 oz in men's medium. The Nano-Air Light Hybrid is 10.5 oz in men's medium.
Availability
The Nano-Air Light Hybrid is easier to find than the Nano-Air Hoody and also less expensive. It's especially easier to find in the women's version. This year, we've only been able to find the Nano-Air Hoody in women's version on Patagonia's website and it hasn't always been available in store.
Warranty
Like all Patagonia jackets, it’s backed by their Ironclad Guarantee. They will repair, refund, or exchange any item for any reason, no matter how long you’ve had it or how much abuse you’ve put it through.
Sustainability
Another thing we like about this jacket is that Patagonia allows you to trade it into their Worn Wear used gear portion of the website to receive store credit. So if your body changes over the years or you get into different outdoor activities, it will stay out of the landfill.
BEST ULTRALIGHT SYNTHETIC JACKET:
MONTBELL UL THERMAWRAP JACKET
Shell material: sleeve 15D Ballistic Airlight rip-stop nylon body 12D
DWR treatment? Yes
Total weight: 8.4 (women's), 9.3oz (men's)
Fill Type: Stretch Exceloft 40g/m2
Number of Pockets: 2 (women's), 3 (men's)
Hood available: Yes (men’s and women’s)
Vest version: Yes, men’s and women’s
Sizes: S-XXL (men's), S-XL (women's)
Packability options: Stuff Sack
Warranty: Limited Lifetime
What we liked: Insulation value makes it optimal for lots of active hiking use, and the fabric helps keep the bulk down. Overall, lightweight
What we didn't like: Runs small, no chest pocket on the women’s version
Small enough for “just in case” peace of mind, and warm enough to make a difference when it counts, professional reviewers and everyday users alike all use the same word when talking about the Montbell U.L. Thermawrap: surprising.
MONTBELL U.L. THERMAWRAP JACKET
MEN'S
WOMEN'S
Treeline editor Liz Thomas wearing the Montbell Thermawrap jacket on top of Mt. Whitney at the terminus of a thru-hike from Badwater in Death Valley. Photo by Kate Hoch.
Where we used it
Many everyday users were surprised by how warm and packable it is. Our very own Liz Thomas raves, “the Thermawrap stays amazingly warm when wet, dries super quick, and is surprisingly lightweight.” A favorite of thru-hikers, you'll see it in our Pacific Crest Trail Gear List & Strategy, Appalachian Trail Gear List, and more.
I personally have used this jacket for EVERYTHING: backpacking the John Muir Trail, cycling across the US, sea kayak guiding in Alaska, and cycle commuting in Pacific NW winters. As such, I was ecstatic to see that a lightweight jacket that is such an integral part of all my adventures was loved enough by other professional reviewers to make this list.
Treeline writer Mike Unger wearing the Thermawrap on his third end-to-end thru-hike of the Pacific Crest Trail. He’s taking a break at some trail magic in the Sierra. Photo by Naomi Hudetz.
Materials
The Montbell U.L. Thermawrap uses 40g/m2 of its proprietary Stretch Exceloft insulation. We like that it moves with you, causing less restriction and a more comfortable fit. The Ballistic Airlight shell fabric increases breathability.
While the sleeves are a 15D fabric, the body is a lighter 12D fabric, allowing more air to permeate the torso (and cutting weight).
But it’s more durable in the arms where there’s more friction with movement, and you’re more likely to need increased durability. That being said, 15D is still a very lightweight fabric. As with all ultralight fabrics, we advise taking extra care to ensure the fabric doesn’t snag and tear.
Sizing and fit
The one complaint we saw with the Montbell UL Thermawrap was that sizing could run slightly small. This seems to have since been fixed with shell fabric and insulation updates. Montbell also now offers a more roomy fit.
We’ve noticed that there can be limited colors, especially in the parka. The size range is limited in women’s and men’s from small to extra-large. There is a men’s XXL option in black only. We’re also bummed that, as with many brands, there is a chest pocket on the men’s version but none on the women’s version.
Features
Some other features we thought were a great way to add value without much of a weight penalty were: a Velcro tab hood adjustment, a DWR-treated front zipper, and placement of the drawcord hem in the handwarmer pocket.
For the additional weight of less than an ounce, we feel the hooded version is worth adding for that extra boost of warmth, potentially eliminating the need to carry a warm hat.
THE CONTENDERS
ARC’TERYX ATOM Hoody
Shell material: Tyono 20D nylon
DWR treatment? Yes
Total weight: 10.9 oz (women), 13.2 oz (men)
Fill Type: Coreloft 60 (60g/m2)
Number of Pockets: 3 zippered
Hoodless jacket version: Yes (men’s and women’s)
Vest version: Yes (men’s and women’s)
Packability options: Stuff pocket
Sizes: S-XXL (men), XS-XL (women)
Warranty: Limited Lifetime: Manufacturers defects for reasonable expected lifetime of the product.
The Arc’teryx Atom Hoodie was just short of winning our top recommendation. It's a little heavier and more expensive than our overall pick, the Patagonia Micro Puff Hoody. Still, there's a lot to love with this jacket. For 2023, the Arc'teryx Atom LT was renamed the Arc'teryx Atom.
ARC’TERYX ATOM LT HOODY
MEN'S
WOMEN'S
Materials
The liner fabric of the Arc’teryx Atom Jacket is soft to the touch, making it comfortable even when worn over a short-sleeved shirt. The 20D shell fabric on the Arc’teryx is also more tear and abrasion-resistant than the Micro Puff at 10D. TAnother thing we liked about the Arc’teryx Atom is the stretchy fleece fabric that replaces the synthetic insulation on the underarm and flank. This kind of active insulation increases breathability compared to most synthetic jackets. While the breathability isn’t quite as good as the Patagonia Nano-Air — which uses specially-designed synthetic insulation made for breathability — it is noticeable compared to other synthetic jackets.
The Atom also includes cuffs that are easy to get off and on, durability in key areas, and uses a dope-dyed liner. I reached out to Arc’teryx to find out what the heck dope-dyed meant. Dope-dying is a “less resource-intensive colouring process.”
Additionally, as with all Arc’teryx apparel, the fit is very athletic, especially when compared to the Patagonia Micro Puff, which fits a wider variety of body types.
Who else likes it
The Atom is also a favorite with REI Customers, Outdoor Gear Lab, and Switchback Travel.
Arc'teryx Atom vs Atom Lightweight vs Atom SL
The Atom is one of Arc'teryx's core models and they've made lots of options to help people find exactly what they need.
For 2023, the Atom LT (which stood for "lightweight") became the Atom Insulated.
The Atom SL (which stands for "superlight") is available.
The Atom Lightweight appears to be the women's version of the Atom SL, is the same price as the men's Atom SL, and is also made of Coreloft insulation.
NORTH FACE THERMOBALL ECO INSULATED
Shell material: 100% recycled nylon
DWR treatment? Not provided
Total weight: Not provided
Fill Type: Number of Pockets: 2 hand, 1 stowable
Hoodless jacket version: Y
Vest version: N
Packability options: None stated
Sizes: S-XXL
The North Face ThermoBall Eco showed up in our research for its affordable price, recycled materials, and widespread availability.
One thing we appreciated about The North Face Thermoball Eco is that it is available in kids' and toddlers' sizing, so a family can match.
However, it didn't have quite the positive expert and customer reviews of the other jackets, so did not make it to our testing rounds.
NORTH FACE THERMOBALL ECO INSULATED
MEN’S
WOMEN’S
COTOPAXI TECA CALIDO HOODED JACKETS
Shell material: Repurposed polyester taffeta with DWR finish and 600 mm PU backer
DWR treatment? None mentioned
Total weight: 13.2oz (men’s M)
Fill Type: 60gsm 100% Polyester
Number of Pockets: 2 on primary and reverse side
Hoodless jacket version: Y
Vest version: Y
Packability options: Packs into chest pocket
Sizes: XS - XXL
Warranty: Lifetime + repairs
Popular for its unique aesthetic and its reversible wear construction, the Cotopaxi Teca Calido Hooded jacket has become popular among consumers in the synthetic jackets space. It’s a little more casual of a jacket than we were after, and find that it may not have the technical characteristics that we’re after for testing synthetic jackets. That said, it’s well loved by many, and it’s available in jacket and vest form in addition to the hooded version so we wanted to highlight it here. It can often be found on sale for less than $100 (check our Deals Page), making it an especially good value.
COTOPAXI TECA CALIDO HOODED JACKETS
MEN'S
WOMEN'S
The author testing an insulated jacket with her child. Sustainability is about making choices that benefit the next generation. Photo by Emily Haas
THE BEST GEAR IS USED GEAR
Looking for a budget puffy jacket? Buy used. Used gear and apparel can be purchased at a fraction of the cost of new gear. We like this because it’s good for the environment, and leaves us with more money to go DO things outside, which is kind of the point.
Many cities have a consignment or resale outdoor gear store. If you don’t live in a place with a used outdoor retailer, hit up the thrift shops. Some diligence and patience can lead to incredible finds. Just don’t start looking a week before you need the jacket.
Don’t have a local used gear store? Prefer shopping online? REI’s Used Gear website makes it easy to search for models and sizes that you want. Patagonia’s Worn Wear also makes it easy to search for models that we recommend.
Just like other consignment stores, you may have to be patient for the thing you want to show up. But it’s easy to check-sometimes as easy as refreshing a bookmarked webpage.
Treeline Review editor Liz Thomas in the Patagonia Nano Puff jacket. Notice how she has multiple layers underneath because the Nano Puff isn’t warm enough? Photo by Grant Sible.
Patagonia NANO PUFF VS. MICRO PUFF?
If you want a Patagonia jacket because you like the fit or color better or want to support their environmental mission, we think it’s well worth spending a little extra for the Micro Puff. It weighs less than the Nano Puff and is warmer.
If you think the extra warmth is overkill for a peak summer hike in warmer conditions, we’d still recommend pairing the Micro Puff vest with a base layer and wind shirt vs. choosing the Nano Puff.
The Montbell Thermawrap and the Patagonia Micro Puff tested side-by-side in the same conditions. Photo by Liz Thomas
IS THE NANO PUFF THE BEST JACKET FOR THRU-HIKING?
Looking for the best synthetic insulated jacket for thru-hiking? Or travel? Despite what some Best Of lists may say, it’s NOT the Patagonia Nano Puff. We feel the need to mention this explicitly.
Although many thru hikers wear the Nano Puff, our testing suggests that the Montbell Thermawrap is a better choice. We’ve owned both these jackets, and our staff has hiked literally thousands of miles in both jackets in cold, wet conditions. The Nano Puff just isn’t worth it.
The Nanopuff has one of the lower warmth-to-weight ratios of synthetic insulated layers we considered. While this is a downside for most, if you do most of your hiking in a warmer climate, having a less warm insulated layer could be a plus, especially given how long this layer lasts.
The warmth-to-weight ratio is much better on Montbell’s Thermawrap. Plus, the Thermawrap is lighter weight than the Nano Puff — the Patagonia jacket weighs 11.9 oz for a men’s medium vs. 9.3 oz for the Thermawrap.
Synthetic jackets can be used in conjunction with other layers like windshirts and baselayers to add more warmth. Photo by Liz Thomas
WHAT IS A SYNTHETIC INSULATED JACKET?
A synthetic insulated jacket is a versatile part of any wet weather or high activity layering system. There’s a reason I have a synthetic puffy in addition to my 3 down jackets. Out of those 4 puffy jackets, my one synthetic gets the most use because of the high versatility of synthetic jackets. Whether you’re hiking, biking, cross country skiing, or going for a cold-weather run, a synthetic jacket can keep you warm when at rest, but keep you from overheating while active.
The Patagonia Nanopuff worn by Marek of Rawlogy. Photo by Liz Thomas
HOW WE RESEARCHED
We researched reviews on NYTimes/Wirecutter, Switchback Travel, Outdoor Gear Lab, Gear Patrol, Big Outside, REI, and Travel + Leisure (see Sources). Then, we polled our own Treeline Review staff. After compiling a list of 19 jackets, we narrowed it down to our primary contenders. We then checked to see if customer reviews matched up with what we were reading to help us pick our top five jackets.
If you want to take a deep dive into synthetic fill, check out this article. See our article to read about the difference between Synthetic vs. Down Insulation and the situations where one is preferable to the other. Below we'll cover the insulation basics in the jackets we picked.
Choosing between a down jacket and synthetic insulated jacket depends on where you are going, what you plan to do in your jacket, and your budget. Photo by Duncan Cheung.
WHAT TYPE OF SYNTHETIC INSULATION IS USED IN JACKETS?
There are many other proprietary, or name-brand synthetic insulations out there — too many for us to cover all. However, despite the proprietary names that insulation companies or outdoor brands may use, their synthetic insulation ultimately falls into those three types: continuous filament, short staple, and cluster fiber.
Synthetic Insulation is constantly getting more packable and has a better warmth-to-weight ratio.
Compare Types of Synthetic Insulation in a Table→
There are three types of construction when it comes to synthetic insulation: Short Staple, Continuous Filament, and Cluster Fiber.
CONTINUOUS FILAMENT INSULATION
Continuous filament is one long fiber that weaves back on itself. Traditionally, it was the bulkiest synthetic fill, although that has changed in recent years. This is the most durable synthetic fill. It tends to be thicker, stronger, and longer lasting. You’ll find this kind of insulation in the Patagonia, Montbell, and Outdoor Research jackets we review.
SHORT STAPLE INSULATION
Short staple fibers are, well, short, thin, and packed together. This type of construction easily creates a high loft without adding a ton of extra bulk. Short staple fibers are not as durable long term as continuous filament. You’ll find this kind of insulation in Arc’teryx jackets.
CLUSTER FIBER INSULATION
Cluster Fiber is a clustered structure that closely mimics down. It’s unclear what, if any, downsides it has at this point (pun intended). You’ll find this kind of insulation in the men’s and women’s North Face ThermoBall Eco, an insulated jacket that came up in our research but didn’t have enough positive expert and customer reviews to make it to our testing rounds.
Almost all of the jackets on our list use continuous filament insulation. The exception is the short staple Coreloft used by Arc’teryx. When we contacted L.L. Bean, they did not know what type of insulation their jacket used.
Higher end synthetic insulation will be as warm and packable as down with a warmth-to-weight-and-bulkiness ratio similar to down. Photo by Duncan Cheung.
DIFFERENCE BETWEEN SYNTHETIC INSULATION FILLS
You can expect high-end insulation fills to have the following performance abilities:
Warmth to weight similar to down
Thickness/not bulky for freer movement
Retain a high percentage (90% or more) of insulation capability when wet
Breathable for moisture management when active
Packable
Water-resistant, so it absorbs less moisture to begin with
Have 4-way stretch to move with you
Fast drying
High loft and soft feel to mimic down
Durable
Synthetic Insulation Comparison Table
| Name | Used By | Type | Description |
|---|---|---|---|
| Coreloft (60, 80 100) | Arc'teryx | Short staple | Crimped multi-denier siliconized polyester |
| PrimaLoft Cross Core; PrimaLoft Gold+NASA Aerogel 60g | L.L.Bean | Unknown | According to Snow Industry News, "silica aerogel is composed of more than 95% air and is the lightest solid material known to" humankind. Aerogel has been worked into the Primaloft Gold fibers and is purported to increase the warmth by 52% while keeping weight low. |
| Full Range 60 | Patagonia | Continuous with 4 way stretch | Stretch, breathability, 40% recycled |
| Polartec Alpha Direct 95 g/m2 | Outdoor Research | Continuous | Lofted-knit fibers connected to solid mesh core. Doesn't need a liner, so is more breathable |
| Stretch Exceloft 40 g/m2 | Montbell | Continuous | Three sizes of siliconised fibers woven together to maximize breathability, stretch, loft |
| Stratus recycled 60 g/m2 | Rab | Continuous | 20% less water retention than PrimaLoft |
| PlumaFill 65 g/m2 | Patagonia | Continuous | "Replicates the structure of down," super packable, good warmth to weight |
Treeline Review editor Naomi Hudetz in camp on a cold morning. Photo by Liz Thomas
BUYING ADVICE
WARMTH
Synthetic insulation has traditionally not been as warm as down insulation. Innovations in technology, however, have narrowed the gap. This has resulted in surprisingly warm synthetic jackets. While synthetic jackets can be warm, they aren’t often equal to down in warmth-to-weight ratio.
WATER RESISTANCE
Although synthetic-filled jackets by their very nature are water-resistant, their water-resistance can be improved by the use of a DWR coating (Durable Water Repellent) on the face fabric or applications to the fibers themselves such as siliconization. Almost all the jackets that we considered have some sort of DWR finish or application to the fibers to improve water resistance.
BREATHABILITY
Breathability is one of the top reasons to choose a synthetic jacket over a down-filled jacket. The water vapor that is produced when you sweat has a difficult time moving through down insulation and away from your body, leaving you wet, hot, and uncomfortable. Plus, if the down is untreated, those same water vapors can reduce the lofting ability of the down.
Highly breathable synthetic jackets are referred to as “active insulation.” Breathability matters the most when you’re using your jacket for high exertion activities like cold weather cycling or alpine climbing.
Breathability is an area where synthetic insulation vastly outperforms down. Still, not all synthetic insulation is created equal. The proprietary FullRange® insulation found in the popular Patagonia Nano-Air has long been one of the most breathable insulations.
We were also impressed by the breathability of Polartec Alpha and Polartec Alpha Direct, found in our former pick (now discontinued) for the best breathable jacket, the Outdoor Research Ascendant Hoody.
With synthetic jacket insulation, breathability is measured by how much moisture in the form of vapor can exit from the inside of the jacket to the outside of the jacket in a given amount of time. If you get sweaty during aerobic exercise, for example, more breathable jackets will move moisture away from the inside of your jacket. When you stop moving, a breathable jacket will make it so you won’t feel soaking wet (and susceptible to evaporative cooling, which in certain conditions can lead to hypothermia).
TYPE OF FILL
Lower-end synthetic fill tends to be bulky, have a low warmth-to-weight ratio, and lose lofting abilities quickly — sometimes even in a matter of months.
One thing became clear while we were researching: most brands are either using well-known, high-end insulation like PrimaLoft Gold or have done tons of R&D to develop their own proprietary insulation technologies, like the insulation used by Patagonia and Outdoor Research. These technologies have advanced so much that in name brands, most insulations will perform equally to name brands like Primaloft. Compare insulation types in our Synthetic Insulation Comparison Table.
Close-up on some features we like including the DWR treated front zipper, front “Napoleon” pocket, and backpack-friendly shoulder stitching. Photo by Naomi Hudetz.
WARMTH-TO-WEIGHT RATIO
It is more difficult to calculate the warmth-to-weight ratio of a synthetic fill jacket than that of a down-filled one. However, many different insulation manufacturers and brands with proprietary synthetic fills will claim that their filling is “warm as down.”
While down jackets generally give you an idea of how much insulation is inside the jacket by listing a fill weight, synthetic jackets work differently. The insulation is classified by grams per meter squared (g/m2). In theory, the higher the number of g/m2, the warmer the insulation.
However, this number doesn’t say how much of that insulation the manufacturer has put in any given jacket. And while the down between brands is more or less an apples-to-apples comparison, the same can’t be said for synthetic insulation.
The synthetic jackets that made it onto our list range from using 40g/m2 insulation to 100g/m2. Traditionally, jackets with less than 100g/m2 insulation would be considered three-season jackets. Jackets with insulation in the 100g/m2 to 200g/m2 range would be four-season jackets.
But these numbers have gotten fuzzy as continuous filament insulation has gotten lighter and less bulky with the advent of down-mimicking cluster fiber insulation. In the last few years, it is possible to find a four-season puffy jacket with less than 100 g/ m2, like the Patagonia Micro Puff Storm at 65 g/m2.
PACKABILITY
Cheap synthetic fill can be incredibly bulky. The most iconic example of cheap synthetic fill is the classic rectangular sleeping bag that kids take to a sleepover at their friend’s house. Again, innovations in synthetic insulation technology have resulted in more packable insulation. This is one possible reason why it is harder to find a truly inexpensive synthetic jacket that is still ideal for outdoor pursuits.
The author testing the LL Bean Primaloft Packaway, which won our award for Best Budget Jacket. Photo by Emily Haas
PRICE
Synthetic insulation is a patented material under different brand names. Only a few companies research, develop, and manufacture synthetic insulation. This means that costs can be more tightly controlled because there is less competition. Down, on the other hand, has multiple suppliers and a wide range of quality, including whether it is ethically sourced or not.
Our synthetic picks ranged from $190-$430, excluding the down/synthetic hybrid from Arc’teryx, while the down products we reviewed ranged from $100-430.
A front pocket on the recycled synthetic material LL Bean Packaway Jacket makes it easy to stash things you’ll need handy. Photo by Emily Haas
SUSTAINABILITY
Unlike our down jacket review, sustainability was not a huge factor in our synthetic jackets. While the industry is starting to trend towards using recycled polyester insulation or shell materials, this is still the exception rather than the rule with synthetic insulation.
Only one jacket, the L.L.Bean Packaway Jacket, used recycled synthetic material for the face fabric. And only one jacket we considered used recycled insulation, the men’s and women’s Rab Xenon Jacket. We aren’t sure exactly why this is. One theory is that there is just more market pressure and awareness when it comes to down, so that is where companies focus their sustainability.
WARRANTY
All the jackets that won our awards have a minimum Limited Lifetime Warranty against manufacturer’s defects. Lifetime, in this case, means the expected lifetime of the product, which varies depending on the product in question.
Manufacturers’ defects are anything that went wrong in production or material that is not as durable as it should be. It does not cover normal wear and tear.
L.L. Bean goes one step further by offering 100% satisfaction guaranteed for the first year after purchase.
Patagonia had the best warranty with their Ironclad Guarantee. They will repair, refund, or exchange any item for any reason, no matter how long you’ve had it or how much abuse you’ve put it through.
Not all manufacturers made their warranty crystal clear, though. Outdoor Research calls it their “Infinite Guarantee” and says their products are guaranteed to “perform” for the lifetime of the product. They do not, however, define what “perform” means.
The Patagonia DAS Parka has one of the best coverage helmet-compatible hoods we saw on a synthetic jacket. Photo by Adam Leckie.
HOODS
Whether you want a hood on your coat is a personal preference. Since synthetic fill jackets tend not to be as warm as their down counterparts, we recommend going with a hooded jacket.
Most of our picks come in non-hooded versions. When using jackets in the front country or for general use, hoods can get in the way. Another reason to be hood-skeptical is that like hats, they may not always accommodate all types of hair. Pro-tip from Treeline Review writer Amanda Jameson: those with relatively large hairstyles look for hoods designated “helmet-friendly.”
Still, not all hoods are created equal. We like hoods that have some level of adjustability to them, like a drawstring or velcro tab. This keeps the hood snug so it doesn’t gap or blow off in the wind, but allows the user to wear a hat or even a helmet underneath.
IS SYNTHETIC INSULATION BETTER THAN DOWN?
Synthetic-fill insulated jackets have a much higher level of versatility than down-fill insulated jackets. We find that if we are unsure what the conditions will be or what our activity level will be, we reach for a synthetic jacket. It’s the “I’d rather be safe than sorry” mindset. If you think you may prefer a down jacket, head over to our Best Down Jackets guide.
Choosing the right winter jacket for you is all about assessing your needs. By asking yourself some basic questions, you can figure out why you would want a down jacket versus a synthetic fill insulated jacket.
ARE YOU VEGAN?
Many vegans prefer not to use down products because they are a by-product of the food industry. Other folks argue that synthetics are just as bad because they are made with fossil fuels. Wherever you land on this topic, we at Treeline believe that buying good quality gear that will last for years reduces the amount of old gear that ends up in a landfill. This reduces the amount of resources needed to keep replacing that cheap, low-quality gear.
WHERE WILL YOU TAKE YOUR JACKET?
If you are in very wet environments, like Alaska, you might want synthetic. If most of your activity is taking place in drier environments, down jackets will keep you warmer for the weight. Traditionally down has been best for dry, cold conditions, while synthetic is best for wet, cool conditions. This is because when down gets wet, it clumps up and no longer traps warm air between the plumes.
The differences have become less stark with the advent of hydrophobic, or water-resistant down. Hydrophobic down can continue to perform even in moist environments. However, if you expect to use your jacket in extremely wet environments for long periods of time and want to use them as activewear, synthetic is still the better choice.
WILL YOU GET WET?
Synthetic jackets retain some of their insulation even when wet. In the case of some higher-end synthetic insulation, they can retain more than 90% of their insulative capacity even when soaked. If you expect to get wet or live in a wet climate, a synthetic jacket is the way to go.
HOW TO CHOOSE AN INSULATED JACKET FOR YOU
Although our guide has six winners that are excellent, the best jacket for you depends on how you intend to use your jacket. Here are some questions and criteria to think about when choosing your jacket.
WEIGHT AND PACKABILITY
Synthetic fill has become lighter weight and more packable. Down still provides the best warmth-to-weight ratio and packability, hands down.
COST
Premium down jackets can easily run upwards of $400.
However, if you’re on a budget, we found that you can get a quality budget down jacket for less than a quality budget synthetic. Mid-range and higher-range synthetics are much less expensive than mid-range and high-range down jackets, though.
DURABILITY
With proper care, down will retain its insulating properties much longer than synthetic. We’re talking decades compared to as little as a few years. The amount of use you put on your jacket will affect this.
Do you live in your puffy (like we do)? Or does it get used for a few months or on a few trips every year? Additionally, jacket shells made with lighter-weight fabrics with a lower denier will not be as abrasion-resistant as heavier, higher denier fabrics. Will you be bushwhacking through dense underbrush with this as your outer layer? You may want to choose synthetic. When shell fabric rips on down, it means feathers everywhere and no warmth for you. If the shell rips on a synthetic jacket, your insulation will stay mostly in place and continue to keep you warm.
WEATHER
Will your jacket be protected under a rain jacket as an insulating layer? If that’s the case, down may work well for you. However, if you expect to be in sustained wet and rainy conditions, even with a waterproof rain shell, you should go with synthetic insulation. Our experience has been that rain jackets eventually wet out, which means the insulating layer gets wet as well. So if you were to wear a down jacket under a rain jacket, after a few hours of rain, your down jacket would be soaked, too. We prefer to wear synthetic jackets under our rain jackets because they will retain warmth even when soaked.
FEATURES
Another way to reduce weight on a jacket is to cut down on extra material, like zippers, pockets, hoods, or drawstrings. If you’re looking at a lightweight synthetic jacket, make sure it still has all the features you want. It can be a bummer when you forget your gloves, it’s 38F degrees and raining out, and you don’t have pockets to stick your hands in.
WHAT IS YOUR PERSONAL MICROCLIMATE?
If you’re not sure, answer this: at home, are you always piling on more blankets in bed or kicking them off during the night? The first example is a person who runs cold, and the second is a person who runs hot. You may also be somewhere in the middle. If you tend to run cold, down will pack more punch when it comes to warmth, and you’ll want a hood. A synthetic will help wick away sweat for folks who run hot.
WHAT WILL YOUR ACTIVITY LEVEL BE?
If the jacket will be used to keep you warm between aerobic activities (like while in camp or at snack time), down is better. During aerobic activities? A synthetic jacket will provide more breathability when you work up a sweat.
If you decide down is the right choice for you, see our Best Down Jackets story.
HOW TO MAINTAIN A SYNTHETIC INSULATED JACKETS
Synthetic jackets still need to be washed periodically, although the process is much simpler than with down. It is still important to follow the manufacturer’s instructions for washing your jacket. Some are washing machine safe; however, if you get a coat with a very light denier, the manufacturer may recommend washing it by hand. If your jacket has been treated with a DWR finish (Durable Water Repellent), then you will need to use a re-proofing spray such as Nikwax DWR Spray Reproofing.
Tenacious Tape has held together this rip in the Montbell Thermawrap for ten years. Photo by Tiffany Searsdodd.
HOW TO REPAIR A SYNTHETIC INSULATED JACKET
Let me hear you say Tenacious Tape! This is a very sticky waterproof repair fabric that can be used in a pinch to repair almost any piece of gear (and not gear) that you own. I’ve used it to repair: insulated jackets, raingear, sleeping bags, hydration bladders, backpacks, and sleeping pads. I've even used it on a cotton skirt I wear when I’m in town. Treeline editor Liz Thomas has even used it on a mesh bag bird feeder.
While Tenacious Tape may not be a long-term fix for a hydration bladder, check out my Montbell Thermawrap that I first repaired 10 years ago. The patches are still holding up strong!
One of the nice things about synthetic insulation is if you get a hole, you don’t have the same level of urgency to repair it as with down. Synthetic insulation pretty much stays put unless actively pulled on, vs down plumules that immediately begin to escape if there is a hole. But we prefer not to take any risks and always have Tenacious Tape in our first aid/repair kit.
See our Eco-Friendly Gear Swaps to Reduce Your Environmental Impact guide to learn more about patching insulated jackets. For other gear repair issues, see our guide on How to Fix Zippers on Outdoor Gear.
AUTHOR’S EXPERTISE / WHY YOU SHOULD TRUST US
The author on a rainy hike in the Pacific Northwest with her child. Sustainable options are the best for the next generation. Photo by Adam Leckie.
I’m a gear nerd who’s been gearing up myself and others my whole adult life. As a Wilderness Guide for a wilderness therapy organization serving teenagers, I spent four winter seasons living in the snow in Central Oregon. As a result, I became intimately acquainted with cold-weather gear, tips and tricks, and how to teach teens how to be comfortable in the wilderness. I’ve also worked as a Sea Kayak Guide for Pangaea Adventures in Alaska, leading glacier tours by kayak.
I also bring almost 20 years of experience working in outdoor retail. I do gear shakedowns for fun. I love talking about gear, but more than that, I love making sure people have the equipment that is right for them. I've spent 20 years outfitting outdoors people of all skill and experience levels on their quest to stay active in cooler weather. Over the years, I've learned what features, materials, sizing, and colors customers want and what aspects of outdoor apparel they find unnecessary. I’m also the author of Treeline Review’s Best Synthetic Insulated Jacket guide.
I have another reason for being an expert regarding down jackets: I’m always cold. Seriously. I own four puffy jackets, three sleeping bags, one backpacking quilt, and one pair of down booties. So I know all about keeping warm while adventuring outside.
I am not sponsored, an ambassador, or an employee of any of the companies mentioned in my reviews - and neither is anyone in my family.
You can read all of my guides on my author page.
