The GI MOLLE II Hydramax[R] Hydration System is a Genuine U.S. Military Issue complete hydration setup — a MOLLE II carrier plus a Hydramax[R] 3L / 100 oz bladder. Carrier is water-resistant 500-denier nylon laminated to single-cell foam backing for insulation. Bladder is food-grade thermoplastic polyurethane with a leak-proof wide slide