Osprey Hydraulics Bite Valve Sheath Replacement (3)Be Dirt and Debris Free Drinking water while you're in the middle of a long ride feels great. What doesn't feel great is when you drink water and the bite valve is filled with dirt, dust, and debris. The Osprey Hydraulics Bite Valve Sheath Replacement is designed to work with Osprey Hydraulics Reservoirs. This piece keeps the bite valve free of dirt and debris. Features Designed for Osprey Hydraulics Reservoirs Keeps the bite valve free of dirt and debris Manufacturer's part number: 10005160 | Osprey | Hydraulics Bite Valve Sheath Replacement (3) Bite Valv Rep Hydration Pack