Versatile, comfortable, flexible, usable. Skeptical at first, but this pack has become a fave! Normally I don't think I would have picked this pack for myself, I thought I was a bladder guy. After trying it out a few times I was pretty happy with it. I remember a few people asking me about the pack at the time and commenting how my elbows would hit the bottles. That has been no problem at all. The location is in a great spot I think. Lower on the back creates a nice low center of gravity, feels… Full review
The Quantum belt is in a category of its own. It is lightweight, low profile and can carry enough nutrition for several hours. The product could be used for quick 2-4 hour hikes where you don't want to lug around a bulky pack, or for running races on sporadically supported courses. *Disclosure: I own a running specialty store and UltrAspire is a brand that I sell. I was given this product for review purposes and was able to keep it. When I first tried this out for a 1.5 hour run I was concerned… Full review
UltrAspire specializes in products for ultra-athletes, including belt systems, multi-sport packs and bottles.