Stansport "Red Wall Hydration Backpack, 2-Liter, Black/Gray nylon Zippered cargo pocket for personal gear 2-Liter reservoir is evenly distributed in the pack Reservoir hose has patented bit valve and won't leak Lightweight yet sturdy design Honeycomb nylon rip-stop/cross woven polyester fabric Ergonomic design evenly distributes weight and fits snuggly to the upper back Features a 2 liter U.S.A. made "liquid solutions" reservoir with patented bite valve Light weight design, "Air-Mesh" back for ventilation and comfort Honeycomb Dacron fabric stands up to the most extreme adventures Features zippered cargo pocket, bungee cord and cord lock