The CamelBak Hydrolink™ Conversion Kit with Hydrolock™A bite valve helps ensure that hydration is always close at hand and convenient to access. However, even the best valves can get worn out from time to time so having a CamelBak Hydrolink™ Conversion Kit with Hydrolock™ is a very good idea. These valves are manufactured from durable plastics for reliable performance every time. They slip right into place and hold securely until they are removed for cleaning or repair.