r_c4519884 wrote a review of UltrAspire Alpha Hydration Vest on March 5, 2014
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.