MOLLE 3 Liter Backstrap Hydration System is MOLLE compatible with neoprene covered plastic hose that features a soft bite valve with on/off switch, quick release backpack straps, back flap, screw cap, and a top and front carry handle. Rothco's hydration system is great for anyone planning to be outdoors.  Polyester

3.0 Liter Replacement Bladder With Bite Valve is Replacement bladder idea for 3 Liter Hydration Packs.  polyurethane