Our Favorite Energy Gels and Chews for Outdoor Activities
Energy gels, energy chews, GUs, BLOKS, and energy bites that taste good
Photo by Becca Downs.
August 5th, 2026, updated with a new 700 calorie product, more details on nutritional info and electrolytes
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Bonking is miserable, and it happens faster than most people expect. When your glycogen runs out on a long effort, energy gels and chews are the fastest way to top up blood sugar and keep moving without stopping to eat something substantial. The difference between a gel that goes down smoothly at mile 18 and one that makes your stomach revolt is something you only learn by testing them in the field.
In the spirit of our Best Backpacking Meals guide, we asked Treeline Review writers (runners, bikers, hikers, paddlers, and skiers) for their single favorite on-the-go energy gel or chew. These aren't ranked picks from a controlled test; they're the products our contributors actually reach for when miles and effort start stacking up.
This is a staff picks article, which means each pick below is chosen and written up by a different Treeline Review writer based on their own field experience. The picks span gels, chews, mashes, and real-food alternatives, with honest notes on taste, stomach tolerance, and the specific conditions each writer tested them in.
A few products come up again and again across our team: Honey Stinger chews for balanced sweetness that holds up over miles, Hüma gels for chia-based digestion that actually tastes like fruit, and Precision Fuel for a neutral-tasting gel that survived a 28-hour ultramarathon without a single stomach complaint. But read through because the right pick depends on your stomach, your pace, and how you feel about tasting the same flavor for six hours straight.
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Comparison Table
| Energy Snack | Favorite Flavor | Treeline Writer | Style | Sweet or Savory | Calories per Package | Carbs | Sodium | Caffeine | Organic? |
|---|---|---|---|---|---|---|---|---|---|
| Honey Stinger Energy Chews | Pomegranate passion fruit | Mary Beth Skylis | Chew | Sweet | 160 | 39 g | 65 mg | 0 mg | Yes |
| Tater Boost Trail Mash | Beet rosemary | Tiffany Searsdodd | Mash | Savory | 300 | 47 g | 850 mg | 0 mg | No |
| Skratch Labs Energy Chews | Lemon green tea | Stasia Stockwell | Chew | Sweet | 160 | 19 g | 35 mg | 2 mg | No |
| Jelly Belly Extreme Sport Beans | Watermelon | Liz Thomas | Jelly bean | Sweet | 100 | 25 g | 80 mg | 50 mg | No |
| Precision Fuel & Hydration PF 30 Gel | Original | Aubri Drake | Gel | Sweet | 120 | 38 g | 70 mg | 0-4mg | No |
| Hüma PLUS Energy Gels | Bananas and berries | Becca Downs | Gel | Sweet | 100 | 24-25 g | 240 mg | 0 mg | No |
| MUIR Energy Gels | Strawberry | Shawnté Salabert | Gel | Sweet | 100 | 23 g | 100 mg | 0 mg | Yes |
| CLIF BLOKS Energy Chews | Any red color | Sara Kruglinski | Chew | Sweet | 200 | 48 g | 200 mg | 0-100 mg | Some ingredients |
| PROBAR BOLT Energy Chews | Strawberry or orange | Chris Meehan | Chew | Sweet | 190 | 46 g | 120-150 mg | 0 mg | Yes |
| Neve Foods Nutrition Squeeze | Tart Cherry Cacao | Mary Murphy | Gel/ smoothie | Sweet | 190 | 20 g | 320 mg | 0 mg | No |
| RecPak Complete Meal | Vanilla Chai | Liz Thomas | Smoothie/ drink | Sweet | 700 | 89 g | 570 mg | 150 mg (coffee flavor) | Some ingredients |
Style: Chew
Calories per package: 160
Sweet or Savory? Sweet
Carbs: 39 g
Sodium: 65 mg
Caffeine? 0 mg
Electrolytes? Yes
When I first started backpacking and running, I found most bars, chews, and gels to be palatable enough. But as I racked up miles, I became pickier. I found that too much sugar made for an upset stomach, and not enough sometimes made it hard to scarf down a snack. Through all of my adventures, one of my favorite energy chews has been the Honey Stinger Organic Pomegranate Passion Fruit Energy Chews.
These are delicious — just sweet enough to give you a boost, and I could eat 100 of them without growing tired of the flavor. Compared to a number of competitive energy chews, I also found these to be more balanced in terms of ingredients.
Style: Mash
Calories per package: 300
Sweet or Savory? Savory
Carbs: 47 g
Sodium: 850 mg
Caffeine? 0 mg
Electrolytes? Not added, but has sodium
Tater Boost initially piqued my curiosity with the name. It made me think of Lord of the Rings, when Sam has to explain “taters” to Gollum. When I heard that it was designed in an Oregon State University food lab with the intention of replacing gels, I was intrigued. I’ve never been a fan of gels. I don’t like the taste, and they usually just give me a sugar high, with the subsequent crash.
Tater Boost is just what it sounds like: potatoes, with a boost in calories from coconut milk, and flavor from things like rosemary and garlic. The idea is that using whole foods will provide longer-lasting energy without the crash of processed sugars.
Tater Boost isn’t ready to eat. You do need to add cold or warm water and mix before eating. The amount of water used is variable, based on your preferred consistency. I found that one 300-calorie packet makes a great snack and is pretty darn tasty. Or I’ll combine it with a protein and vegetable for a quick trail lunch. It may not be as filling as Lembas bread, but I’m pretty sure I could deliver the ring of power to Mount Doom if I had enough of these.
Style: Chew
Calories per package: 80
Sweet or Savory? Sweet
Carbs: 19 g
Sodium: 35 mg
Caffeine? 2 mg
Electrolytes? Yes
I’m picky about the flavor of my sports nutrition, and there’s one brand that’s never let me down in the taste department: Skratch Labs. One of my all-time favorite items for when I need quick, easily digestible energy is the Green Tea + Lemon Energy Chews. The flavor is a refreshing departure from berries, and while I tend to despise anything that’s lemon-lime, these are truly delicious. They’re perfectly sweet with a good balance of simple carbs and electrolytes.
I particularly like that Skratch forgoes ingredients like carnauba wax (which is often used to keep chews from sticking together, but wreaks havoc on my gut after a while) and instead just coats the chews with a dusting of sugar. The packs are a little tricky to open and eat mid-bike race, but they’re my go-to for when I’m stopped at an aid station, or during training rides and long trail runs.
Style: Jelly bean
Calories per package: 100
Sweet or Savory? Sweet
Carbs: 25 g
Sodium: 80 mg
Caffeine? 50 mg
Electrolytes? Yes
The watermelon Jelly Belly Sport beans taste like success to me. There's something about the candy coating requiring chewing that tricks my mind into thinking this is a more substantial meal than other energy foods.
With carbs, electrolytes, caffeine, and vitamins, it's got everything the more "grown-up" looking gels and chews have. But this throwback from my childhood feels like comfort food. When I'm bonking, it provides more than a calorie boost but a morale boost. I wouldn't say my FKT of the Appalachian Trail from a decade ago was completely due to eating massive quantities of jelly beans, but I do credit it with keeping my blood sugar, caffeine levels, and morale high throughout the trip.
- Liz Thomas, Treeline Review Co-founder and Editor-in-Chief
Style: Gel
Calories per package: 120
Sweet or Savory? Sweet
Carbs: 30 g
Sodium: 0 mg
Caffeine? 0 mg
Electrolytes? No, intended for use with other Precision Fuel products
As a hiker and backpacker who dabbles in ultramarathons, I feel like I have a leg up on many runners since my stomach and I have so much practice eating while moving. But at a certain point in an ultra (or a long-distance backpacking trip), I get tired of chewing. For my most recent 100-mile ultramarathon, Precision gel was my secret weapon.
It’s a simple, bright-tasting gel made with a 2:1 combo of glucose and fructose for ease of digestion, with a consistency like aloe vera that’s easy to sip without choking on it as I run. Each serving has 30g of carbs, and their 90g/360 calorie packet is resealable, preventing sticky fingers and keeping me fueled for hours on a single packet! It’s unflavored to reduce flavor fatigue while also being a pleasant neutral taste.
I always looked forward to my slurps of this gel; I was sad when I ran out for the last few hours of my race and had to use other gels. I’m proud to report that after pre-race practice, I was able to fuel 300 calories/hr with no stomach upset for my entire 28-hour race, primarily using these gels. I’d recommend these to any runner looking for a simple gel that goes down smoothly from start to finish!
- Aubri Drake, Contributing Writer
Style: Gel
Calories per package: 100
Sweet or Savory? Sweet
Carbs: 21 g
Sodium: 240 mg
Caffeine? 0 mg
Electrolytes? No
In my prime marathon and ultra-training days, I really struggled with mid-race nutrition. Most energy gels made me nauseated, and real food was logistically difficult. When I tried Hüma Energy Gels, though, my marathon game changed. Made from chia seeds, sea salt, either cane sugar or fruit concentrate, brown rice syrup, real fruit, water, and citric acid, the ingredients are simple, easy to digest, and offer the carbs, calories, and electrolytes I need.
And? They actually taste good. I’ve never enjoyed a GU (sorry), but I’ve enjoyed Hüma mid-excursion.
If you ever read Born to Run (2009) by Christopher McDougall, you may recall the chia seed craze borne from the Tarahumara practices illuminated in the book. Hüma hopped on that train – not to chase a fad, but because of the chia seed’s nutritional profile and slow-releasing energy. Regardless of your feelings on Born to Run’s impact, chia seeds in an energy gel is brilliant, and Hüma is the only energy gel I use (I especially love the Bananas and Berries flavor!).
Style: Gel
Calories per package: 100
Sweet or Savory? Sweet
Carbs: 23 g
Sodium: 100 mg
Caffeine? 0 mg
Electrolytes? Yes
As a backpacker, trail runner, and gym rat, I’m constantly on the hunt for portable food that contains just enough calories to offer an energetic boost while not destroying my stomach in the process. I stumbled across California-based MUIR Energy years ago and was instantly enamored with their sturdy little pouches, filled with easily digestible combos of salt, molasses, and real foods like fruit and nut butters.
I also appreciate the texture - despite their name, these aren’t “gels” in that sticky, gooey sense. Instead, they’re more of a thick paste that feels heartier, more satisfying, and less artificial on the palate. While I’ve never forgiven them for seemingly discontinuing my favorite flavor (I miss you, sweet potato), their strawberry formula served as a bit of tasty, not-too-sweet motivation as I cranked up a number of high alpine passes on the Nüümü Poyo / John Muir Trail this summer.
-Shawnté Salabert, Contributing Writer
Style: Chew
Calories per package: 200
Sweet or Savory? Sweet
Carbs: 48 g
Sodium: 200 mg
Caffeine? 50-100 mg (some flavors)
Electrolytes? Yes
When I am doing on long runs I have a hard time eating food and getting calories in so I don’t bonk. After a lot of trial and error with gels and chews, CLIF BLOKS Energy Chews are the best thing for my delicate stomach.
I like that the CLIF BLOKS are readily available online and in most stores, and that there are enough flavors to sample so I don’t get bored. They remind me of fruit snacks. I find that if I am having a hard time eating on a run, I can have just a bite of a block and it is not messy in my stash pocket, unlike a gel where you have to eat the whole packet in one go or risk it leaking all over the place. I also like that these blocks hold up well to temperature shifts. I have eaten them on snowy runs and scorching hot days, and the BLOKS still have their shape.
For super long morning runs, I use the BLOKS with caffeine and skip the coffee. My favorite flavors are anything red; they seem to be the easiest to eat. Another plus is that you don’t have to use them all at once. They store easily for another run—eat half a pack on a long day and save the rest for next time.
-Sara Kruglinski, Operations Coordinator and Contributing Writer
Style: Chew
Calories per package: 190
Sweet or Savory? Sweet
Carbs: 46 g
Sodium: 150 mg
Caffeine? 0 mg
Electrolytes? Yes
I’ve tried the majority of energy chews that other Treeliners love and like most of them, but the ones I gleefully grab whenever I see them on sale (or off sale for that matter) are PROBAR’s BOLT Energy Chews.
I’m usually chomping on these in the middle of mountain biking, climbing, or backcountry skiing and prefer non-caffeinated chews and gels as the caffeine tends to make me feel jittery and ups my heart rate. The cane sugar, electrolytes, and B-vitamin mixes help me feel refreshed enough alone, and I find the Bolt chews are easier to digest than some other options I’ve tried over the years.
I also believe in avoiding flavor fatigue, so I usually go back and forth between Strawberry and Orange (when I can find them). Since I’ve started using them and sharing them on adventures, it seems like more and more of my buddies start buying them more often, too.
–Chris Meehan, Treeline Review contributing writer
Style: Gel/ smoothie
Calories per package: 190
Sweet or Savory? Sweet
Carbs: 20 g
Sodium: 320 mg
Caffeine? 0 mg
Electrolytes? No, sodium only
Not quite food but not quite a gel, these science-backed, athlete-founded fuel pouches are some of my new favorites— especially on longer runs and backpacking trips!
When I want a healthy serving of some carbs and natural sugars, I can reach for fruit-based Neve instead of overly processed gels or chews. Neve currently comes in two flavors, Boysenberry Beet (beets are full of nitrates to support blood flow) and Tart Cherry Cacao (cherries are anti-inflammatory). Both flavors are packed with sugars, antioxidants, sodium, iron, potassium, calcium, and fiber. I love reaching for these if I don’t want anything too salty, too sugary, or with added caffeine—they have a mildly sweet, smoothie-like taste. The cherry cacao is currently my top choice for simple nutrition on the go!
–Mary Murphy, Treeline Contributing Writer and Editor
Style: Smoothie/drink
Calories per package: 700
Sweet or Savory? Sweet
Carbs: 89 g
Sodium: 570mg
Caffeine? 150 mg (coffee flavor)
Electrolytes? Yes
RecPak Complete Meals are like a GIANT gel, delivering 700 calories in one package. For thru-hikers, backpackers, and ultramarathoners who need that kind of energy and can't stop, the RecPak is a convenient and easy way to get a bunch of nutrition in one stop. With a balanced 50% carbs, 25% protein, 25% fat, it is designed for endurance activities. It includes electrolytes, vitamins, and minerals (with optional caffeine flavors). And it has a whopping 43 g of protein in one package!
Unlike other gels, you add water to the package to create this full meal smoothie. RecPak comes in a packaging that looks like a giant gel packet. It even has a removable leakproof lid (since downing 700 calories is a lot). Unlike other endurance beverages we've tested, there's no need to pour powders into a bottle. The consistency is also thicker than other smoothies, so it feels more like a giant gel.
I used the Vanilla Chai flavor on my winter thru-hike of the Ouachita Trail earlier this year and wish I had more of them. On a day too cold to stop moving, it was a flavor-boost pick-me-up when I was feeling really low. The 700 calorie pick-me-up was just what I needed to boost my mood and keep going.
For physical exertion when stopping to eat real food and chewing are too hard, and you need a meal's worth of nutrition, RecPak is the fastest and best-tasting way to do it.
- Liz Thomas, Treeline Review Co-founder and Editor-in-Chief
What are energy gels and chews?
Energy gels are small packets of concentrated carbohydrates in a syrupy texture you can swallow quickly without stopping or much chewing. Energy chews are bite-size gummy pieces that deliver similar carbs at a slower, nibble-friendly pace. Both are built for sustained effort when you need calories fast and don't want to stop to eat something substantial.
The reason they exist is simple: once you're past roughly 60 to 90 minutes of hard effort, your stored glycogen won't carry you to the finish. Gels and chews top up blood glucose so your legs keep moving, your brain stays sharp, and you avoid bonking. They're not magic, but when you're two hours into a trail run or halfway up a long climb, the right gel at the right moment makes a real difference.
Why you need energy gels and chews
The short version: real food is great until it isn't. At high intensity, with your heart rate up and your breathing labored, unwrapping a sandwich or digging a bar out of your pack becomes genuinely annoying. Gels and chews are designed for exactly that situation. They're small enough to fit in a vest pocket, require minimal chewing, and deliver fast carbohydrates without the bulk.
They're also more stomach-friendly than solid food during hard efforts. Simple carbs in low volume absorb faster than complex foods when your digestive system is competing with your working muscles for blood flow. That's not just marketing. Most of our contributors learned this the hard way before finding what worked for them.
For easy hikes and day trips, you probably don't need them. For anything longer than 90 minutes of sustained effort, especially at altitude or in heat, having something fast and reliable in your pocket is worth it.
What to look for in energy gels and chews
Carbs per serving
Most gels provide 20 to 30 grams of carbohydrate per packet. Chew sleeves typically run 40 to 50 grams for a full serving. A common starting point for sustained effort is 30 to 60 grams per hour, though this varies by body weight, intensity, and gut tolerance. Figure out your number in training, not on race day.
Sodium content
This varies wildly across products. If you're a heavy sweater or working in the heat, sodium matters. Most gels and chews won't cover your full electrolyte needs on their own, so plan to supplement with a drink mix or capsules if needed. Separating your fuel from your hydration gives you more control over both.
Caffeine
Some products include 20 to 100 mg per serving. Caffeine genuinely helps with focus and perceived effort, but it adds up fast if you're taking multiple servings per hour. Our contributors who use caffeinated options tend to save them for the second half of long efforts or alternate with non-caffeinated servings. If you're sensitive to caffeine, stick with non-caffeinated versions throughout.
Texture and mouthfeel
Gels range from thin and watery to thick and pudding-like. Chews range from soft to surprisingly firm in cold weather. Pick a texture you can handle while breathing hard. If sticky mouthfeel bothers you after a while, thinner gels or a sip of water after each serving helps reset your palate.
Flavor fatigue
This is real on long efforts. Rotating between citrus, berry, and neutral flavors helps more than most people expect. Several of our contributors specifically rotate flavors to avoid burning out on a single taste by mile 15.
Ingredients
Scan for anything your stomach doesn't tolerate: sugar alcohols, artificial sweeteners, gelatin, dairy, or soy. Real-food-based gels like MUIR and Hüma tend to have shorter ingredient lists that sit better for people with sensitive stomachs. Pectin-based chews are generally the plant-based option if you're avoiding gelatin.
Packaging
Easy-tear notches, tethered caps, and resealable sleeves matter more than they sound like they would. Try opening your chosen product with sweaty hands while running before committing to it for a race. Sara specifically notes that CLIF BLOKS don't require eating the whole packet at once, which matters for managing intake on long efforts.
Temperature performance
Gels get runnier in heat and can leak. Chews and thick gels can go rock hard in cold. Keep packets close to your body in winter and pre-tear notches before cold starts. In summer, avoid leaving gels in a hot pack or on a sunny surface for hours before you need them.
How to choose energy gels and chews
Start with your effort length and intensity. For shorter efforts under 90 minutes, you may not need gels or chews at all. For longer efforts, plan around 30 to 60 grams of carbs per hour as a starting point and adjust based on how your stomach responds.
Pick your format based on how you like to eat while moving. If you want something fast and hands-free, gels work better. If you like the satisfaction of chewing and want to meter out your intake in smaller bites, chews are the better option. Several of our contributors mix both on long days to manage flavor and texture fatigue.
Decide on sodium and caffeine based on conditions and duration. Hot day or heavy sweater? Choose formulas with meaningful sodium and plan for extra electrolytes. If you're using caffeine, schedule it strategically rather than taking it in every serving from the start.
Test everything in training. This is the only rule that matters. Nothing in this guide is a guaranteed fit for your stomach, your pace, or your preferences. Every contributor in this article arrived at their pick through trial and error, and most of them have a drawer full of products that didn't work out. Buy a few options, test them on your long training days, and nail down your plan before you need it to count.
FAQ
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Consume 30-60 grams of carbohydrates per hour during activities lasting longer than 90 minutes, which equals 1-2 energy gels or chew packets hourly. Start fueling within the first hour and maintain consistent intake rather than waiting until you feel tired. For activities under 90 minutes, your body's stored glycogen is typically sufficient. Ultra-endurance athletes may need up to 90 grams per hour using multiple carbohydrate sources for better absorption and reduced stomach upset. Check with your doctor or nutritionist before starting any new diet or training regimen.
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Energy gels provide faster absorption and easier consumption while moving, while chews offer a more satisfying texture and controlled portion sizes. Gels typically contain 20-30 grams of carbohydrates per packet and digest quickly, but can cause stomach upset if consumed too rapidly. Chews allow you to eat smaller portions gradually and provide psychological satisfaction through chewing, but require more time to consume and may be harder to eat while running at high intensity.
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Begin consuming energy supplements 30-45 minutes into activities lasting longer than 90 minutes, before you feel tired or hungry. Your body's glycogen stores typically last 60-90 minutes during moderate to high-intensity exercise. Starting early prevents energy deficits that are harder to recover from once they occur. For very long efforts like ultramarathons, establish a fueling schedule every 30-45 minutes rather than eating only when hungry.
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Energy gels can cause nausea, cramping, or diarrhea if consumed too quickly, without enough water, or if you're sensitive to certain ingredients. High sugar concentrations, artificial sweeteners, and rapid consumption are common culprits. Prevent stomach issues by practicing with gels during training, consuming them with water, and choosing products with simpler ingredient lists. Some people tolerate real-food-based options better than heavily processed gels.
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Choose caffeinated options for mental boost and performance enhancement, non-caffeinated for sensitive individuals or when consuming multiple servings. Caffeine provides 3-6% performance improvement and mental alertness but can cause jitters, increased heart rate, or stomach upset in sensitive people. Limit caffeine to 200- 300 mg per day from all sources. Non-caffeinated options work better for activities requiring multiple hourly feedings without exceeding safe caffeine limits.
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Consume 6-8 ounces of water with each energy gel to aid digestion and prevent stomach upset. Concentrated gels need to be diluted to absorb properly and avoid drawing water from your bloodstream into your stomach. Insufficient water can cause cramping, nausea, and poor absorption. During hot weather or high sweat rates, increase water intake accordingly and consider electrolyte replacement along with carbohydrate fueling.
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Avoid high amounts of fructose, sugar alcohols, artificial colors, and preservatives if you have sensitive digestion. Fructose above 30g per hour can cause stomach upset since your body can only absorb limited amounts. Sugar alcohols like sorbitol may cause digestive distress. Some people react poorly to artificial colors, flavors, or preservatives. Most people find it is easiest to digest gels and chews with simple ingredient lists featuring glucose, sucrose, or maltodextrin as primary carbohydrate sources. Check with your doctor or nutritionist if you have any concerns about ingredients to avoid.
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Most commercial energy gels and chews last 12-24 months when stored properly in cool, dry conditions. Check expiration dates and rotate stock for outdoor adventures. Heat and humidity can degrade texture and flavor, while freezing may affect consistency. Store products in stable temperatures and avoid leaving them in hot cars. Homemade alternatives typically last days to weeks depending on ingredients and storage methods.
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Yes, energy gels work well for cycling, hiking, climbing, skiing, and any sustained activity lasting over 90 minutes. The carbohydrate and electrolyte benefits apply to all endurance activities. However, consider activity-specific needs - cyclists may prefer larger volumes since they're not bouncing, while climbers might want smaller, more frequent doses. Hiking often allows for more real food options due to lower intensity and pack storage capabilities.
How we tested
Treeline Review writers have collectively eaten through literally thousands of packets of gels, chews, blocks, mashes, smoothies, and whole-food alternatives over years of running, hiking, biking, paddling, climbing, and skiing. This guide pulls directly from that experience: we asked each contributor to name the single product they actually reach for when effort and miles start stacking up.
The testing behind these picks spans a wide range of conditions and contexts. Liz Thomas used Jelly Belly Sport Beans across a FKT attempt on the Appalachian Trail. Aubri Drake fueled a 28-hour 100-mile ultramarathon almost entirely on Precision Fuel gels, tracking 300 calories per hour with no stomach issues. Sara Kruglinski has tested CLIF BLOKS across snowy winter runs and scorching summer days. Shawnté Salabert has carried MUIR Energy on trail runs including the John Muir Trail. Stasia Stockwell tested Skratch Labs chews specifically for mid-race use at aid stations and during training rides and long trail runs. Mary Beth Skylis arrived at Honey Stinger after years of eliminating options that caused stomach upset on long efforts.
No product in this guide is here because of a brand relationship or because it looked good on paper. Every pick is something a Treeline writer has used repeatedly, across real conditions, and would reach for again.
- Long runs and ultramarathons
- Thru-hikes and backpacking trips
- Training rides and bike races
- Snowy outings and hot-weather efforts
- Repeated use during long endurance days
- Taste and flavor fatigue
- Digestion and stomach tolerance
- Texture and ease of eating
- Packaging and on-the-move use
- Performance in hot and cold conditions
Why you should trust us
Treeline Review writers have eaten at least a hundred different gels and energy chews. In addition, Treeline Review writers have led workshops on What I eat during a thru-hike and Backpacking Nutrition and Resupply Tips.
Many of us have covered gels and chews for other publications. However, this guide includes all of our favorites, verified by other Treeline Review writers. At Treeline Review, we want you to buy gels and chews right the first time–so you never bonk and can always feel strong, fueled, and hydrated while outdoors.
