2 Liter Hydration Pack System Bladder Volume: 68 oz (2 liter) Storage Volume: 570 cubic inches Dobby Diamond Ripstop Construction Features: full rain shield with velcro fastener * 7 organizational pockets * drip free dual action bite valve * adjustable waist and sternum strap * 2 supplemental bottle compartments * neoprene phone/mp3 holder * interior key clip * earphone access * reflective taping * bungee cargo holder * padded ventilated back panel * active suspension harness * button hole bladder support * webbed compression straps