Osprey Packs Osprey Hydraulics Bite Valve Cover, One Size Go to amazon.com Related posts Top 10 best bite valve cover: Which is the best one in 2022? FeatureReplacement for all hydraulics Series reservoirsKeeps bite valve free from dust and dirtBite valve not included DescriptionThe osprey hydraulics bite Valve cover keeps your osprey hydraulics bite Valve free from dirt and dust on the trail