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An ultra-runner's hydration vest with a back pocket you can actually reach.

Stay well energized and hydrated and keep a solid pace mid-way through your 50K run with the UltrAspire Alpha Hydration Vest. This vest features comfortable, breathable fabric, a 2-liter hydration bladder, a plethora of pockets for your energy food, electrolytes, and salt tabs, and a back pocket you can access without taking the vest off.

  • Contoured shape and vest design offers a natural fit and load stability, and enables the pack to move multi-directionally in tandem with you for long-term comfort
  • Large-hole microfiber mesh fabric throughout lends superb breathability and comfort during your race or training sessions
  • Soft, non-chafing fabric wicks moisture away from your skin and dries quickly
  • Lightweight zipper pulls are easy to grab even with gloves or cold, numb fingers
  • Included 2-liter reservoir rides lower near the small of your back for better center of gravity
  • Back Proprietary Passage Pockets with left- and right-handed access are fully accessible while you wear the pack and feature no-worry dual magnetic closures
  • Sweat-proof front Magnon Electrolyte pocket with easy, worry-free magnet closure holds and protects your salt tabs or energy pills
  • Quick-access right and left front pockets hold your spare bottles or other essentials and uniformly compresses with a cord
  • Left mesh front pocket over an internal zippered pocket houses nighttime accessories and energy foods
  • Low-profile, stretch side panels with elastic mesh pockets hold your trash
  • Zippered small elastic mesh pocket on shoulder strap for convenience
  • Shoulder strap hook holds water tube so it stays out of the way when you're not drinking
  • Reflective details on the front and back

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Here's what others have to say...

4 5

Great vest!

  • Familiarity: I've used it several times

I really liked the minimalist design of the Alpha so I am trying it for my first 50K this fall. Have used it in runs up to 20 miles in hot weather, different shirts, and no chafing. I normally wear XL tech shirts and the L/XL size vest fits good, but I was expecting a bit more compression. I use it half way through the adjusting straps to keep it snug. The high-flow of the valve is nice, comes handy for dousing/rinsing. I was expecting less sloshing with the soft bladder especially when full, but no big issue. Not much different than when carrying handhelds in my opinion. The rear pocket takes some effort to access, but you really do not need to remove the pack, which is a plus of this design. Overall a great product!

5 5


  • Familiarity: I've put it through the wringer

Here's what: This vest feels like a part of your body. Is that weird to say?

I've used this vest on trails runs of all lengths and even after hours it doesn't rub or chafe. It's lightweight (until you load it down with all your running essentials, which you will because there are so many storage pockets in this vest you feel compelled to put something in every one!!) and is not restrictive anywhere.

Two things that detract from the general ease of this vest, 1) the drinking valve is a little tight to open, so keep it open and facing up for easier access, and 2)the front closure hooks are hard to undo. There's really no way around this but I've found that saying a few swearwords when I'm opening them makes me feel better about it.

I think UltrAspire makes really great running products. They have a new vest coming out specifically for WOMEN that won a design contest for the state of Utah. Can't wait!

4 5

Solid minimalist pack

  • Familiarity: I've put it through the wringer

I've used this pack for a number of runs ranging from 15-50 miles in a broad range of weather conditions. Here's what I've found:
This pack is extremely light weight and rides well, but it does tend to cause the back of my shirt to bunch up at the beginning of a run. This problem quickly goes away as soon as my shirt gets sweaty or wet though, so it's not a big issue. The mesh is tough but also low abrasion, so this pack can be worn without a shirt on super hot days without extreme amounts of chafing. The magnetic front pocket for electrolyte supplements actually does seem to be pretty water/sweat resistant and does a good job of keeping tablets or pills from melting while running.
The mesh pockets on the straps are large enough to accommodate 20 oz bottles, but unless they are ergonomically contoured, be prepared for sore ribs after you complete your run.

My one beef with this pack is that the shock cord in the back is pretty spare. I have carried jackets in it, but it would be nice to have more cord to play with.

Overall, this is a great minimalist 3-season pack that carries enough hydration/calories/gear for 20-30 miles of tough running without a resupply.