Features a 2 liter U.S. made "Liquid Solutions" reservoir with patented bite valve. Ergonomic design evenly distributes weight and fits snugly to the upper back to minimize fatigue. Lightweight design features an "Air-Mesh" back for maximum comfort and ventilation. Honeycomb nylon rip-stop/cross woven Dacron fabric stands up to the most extreme adventures. Zippered cargo pocket personal gear. Bungee cord and cord lock.