Camelbak HydroBak 50 oz Hydration Pack

The HydroBak provides hands-free hydration on the road or trail for minimalist expeditions. Boasting a short pack profile and exceptional ventilation with a diamond mesh back panel and lightweight mesh harness, the HydroBak delivers barely there comfort. The Antidote Reservoir offers ready access to your hydration while the essentials pocket holds your wall and keys, and the reflectivity ensures that you stay visible on the road. Hydration Capacity: 50 ounces (1.5 liters)

Torso Length: 13 inches (33 centimeters)

Pack Weight: 5.5 ounces (160 grams)

Fabric: 70D Diamond Clarus with DWR + 1000mm PU coating, 210D Nylon with DWR + 400mm PU coating

Pack Features:

Diamond mesh back panel
Lightweight mesh harness
External fill reservoir
Short pack profile
Essentials pocket
Reflectivity
Carries: multi-tool or wallet, keys

Antidote Reservoir Features:

Low-profile design for unmatched stability
Air-light fillport cuts weight
HydroGuard technology to inhibit the growth of harmful bacteria and prolong reservoir life
PureFlow tube
Patented Big Bite Valve for easy drinking
Easy-to-clean wide-mouth opening
Quick-seal cap tightens in just a quarter turn

Owner Reviews, Ratings, Comments and Criticism
I used to make fun of people I saw running with these things on. In all honesty they are silly looking. But for long runs they are a life saver. It takes about two minutes of being on my back before I forget it is there. It is much better than carrying a bottle, and holds about four times as much. It supplies enough water for fifteen miles on a hot day. There is a little pocket on the back that can fit your keys and an ipod, which I prefer to having my ipod strapped to my arm. The pocket is not good for gels or anything that you want to access without having to stop and take the pack off. I think the greatest benefit of Camelbaks is the freedom of not have to plan runs around water breaks. For the price, I really can't recommend the HydroBak enough.