Rothco Replacement Bite Valve. The bite valve is constructed from PVC plastic to prevent leaks and for a soft bite. The soft bite feature offers easier access to your fluids while hiking biking or during other high-intensity activities. Specifications for Rothco Replacement Bite Valve: Manufacturer: Rothco Color: Blue Fabric/Material: PVC plastic PVC Features of Rothco Replacement Bite Valve Material: PVC Material Specs: PVC plastic Package Contents: Rothco Replacement Bite Valve Rothco Replacement Bite Valve 20006