#8 on this list
BLOKS Energy Chews
CLIF
CLIF BLOKS Energy Chews have remained a benchmark in endurance sports for good reason: they are straightforward, predictable, and packaged with extreme convenience in mind. Geared toward cyclists, trail runners, and alpine scramblers, these semi-firm cubes deliver a reliable surge of carbohydrates backed by varying levels of sodium to match your environmental sweat rate. The defining feature of CLIF BLOKS is their iconic 'Fastpak' sleeve packaging. The narrow, vertical cylinder design fits seamlessly into shoulder-strap pockets, bicycle jersey slots, and hip belts. More importantly, the packaging allows you to squeeze the bottom to pop a block directly into your mouth with a single hand, keeping your other hand firmly on a trekking pole or handlebar without fishing around inside a sticky pouch. The chew texture is dense and gummy, which helps the blocks maintain their structure in blazing heat without turning into a liquefied mess. The downside is that they require concerted chewing effort. If you are climbing at your VO2 max and gasping for air, chewing a dense block can feel labor-intensive. Sticking to lower-intensity flats or grinding ascents is the best way to utilize them. **Highlights** - Fastpak sleeve allows easy, one-handed dispensing straight into the mouth - Firm, resilient chew structure will not liquefy or melt in extreme heat - Slim vertical package shape slides neatly into narrow vest and jersey pockets - High carbohydrate density per sleeve fuels long efforts with fewer packages - Broad range of sodium options available to suit high-sweat athletes **Watch-outs** - Dense, gummy texture requires considerable chewing while moving fast - Sleeve format creates a long wrapper that requires careful pack-out to avoid litter - Extracting the final block from the bottom of the tube can get sticky
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#9 on this list
Bolt Energy Chews (Non-caffeinated)
ProBar
ProBar Bolt Energy Chews are built for mountain athletes who love the convenience of gummy chews but want a softer, more pliable consistency that does not wear out their jaw over an ultra-distance day. This non-caffeinated formulation is ideal for athletes who want pure carbohydrate replenishment without disrupting their heart rate or sleep cycle during evening training runs and overnight endurance events. The chews are crafted using organic tapioca syrup and cane sugar, bound with plant-based pectin. This construction results in an exceptionally tender chew that yields instantly upon biting, dissolving quickly into an easy-to-swallow liquid. The fruit flavors are rich and sweet, balanced nicely with an electrolyte blend of sodium and potassium to support cellular hydration on warm ridgelines. Because the texture is softer and more tender than traditional gelatin gummies, these chews do have a tendency to soften further and stick together if left in a sun-baked vest pocket all afternoon. While the wide pouch protects them well enough, opening the top seam requires two hands, and you may find yourself having to pinch apart fused chews before you can toss one back. **Highlights** - Tender, soft-chew consistency requires minimal jaw fatigue to break down - Caffeine-free formulation is safe for all-day and nighttime fueling - Plant-based pectin base provides clean digestion without animal gelatin - Infused with essential electrolytes and B vitamins for metabolic support - Pleasant, authentic fruit flavors without a chalky mineral finish **Watch-outs** - Chews can soften and stick together when exposed to direct summer heat - Wide pouch footprint takes up more room in low-profile running vests - Requires two hands to tear open and retrieve individual pieces
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Specs side by side
| Spec | BLOKS Energy Chews | Bolt Energy Chews (Non-caffeinated) |
|---|---|---|
| Form Factor | Chewable carbohydrate cubes | — |
| Packaging | Fastpak push-up sleeve | — |
| Calories Per Sleeve | Approximately 200 calories (6 pieces) | — |
| Carbohydrate Source | Tapioca syrup and cane sugar | — |
| Texture | Firm, resilient gummy | — |
| Dietary Profile | Plant-based, USDA Organic | — |
| Gelling Agent | — | Plant-based pectin |
| Primary Carbs | — | Organic tapioca syrup, cane sugar |
| Calories Per Pouch | — | Approximately 180-190 kcal |
| Caffeine Content | — | 0 mg (caffeine-free) |
| Electrolytes | — | Sodium, potassium blend |
| Serving Format | — | 60 g foil pouch |
What our reviewers liked and didn't
BLOKS Energy Chews
- Fastpak sleeve allows one-handed, push-up dispensing directly into the mouth
- Firm gummy structure resists melting in high-heat conditions
- Slim vertical profile fits cleanly in running vests and jersey pockets
- Enables precise calorie micro-dosing rather than consuming an entire packet at once
- Dense texture requires concerted chewing that can disrupt hard breathing
- Extracting the final block from the bottom of the sleeve can leave sticky residue
- Can become very stiff and difficult to chew in sub-freezing winter temperatures
Bolt Energy Chews (Non-caffeinated)
- Tender, pectin-based texture causes minimal jaw fatigue during long efforts
- Caffeine-free formula allows round-the-clock fueling without sleep disruption
- Plant-based ingredients contain no animal gelatin
- Balanced electrolyte additions support hydration without chalky flavor
- Pieces easily soften and stick together in hot pockets
- Wide pouch footprint takes up extra room in slim vest pockets
- Tear-top pouch typically requires two hands to open and dispense
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