Osprey hydraulics bite valve coverif you have ever been on the trails and gone to take on some fluids via the bite valve on your reservoir only to end up with a mouthful of dirt or dust then you know how frustrating and distasteful it can be thanks to the hydraulics bite valve cover you can keep your reservoir bite valve free from the dirt and dust while blazing the trail featureskeeps dirt and dust out of bite valvebuy osprey accessories from chain reaction cycles the worlds largest onlin