Package of four silicone bite valve sheaths — replacement parts to keep your hydration bladder working comfortably and reliably. Key benefits Maintain hydration efficiency: worn or damaged bite valve sheaths regularly to preserve smooth water flow and reduce interruptions during activities. Improved drinking comfort: Soft silicone provides a gentler, easier bite and reduces jaw fatigue during long or intense use. Simple upkeep and replacement: Sold in a pack of four so you can swap sheaths as needed for hygiene and performance without running out. What it does and why it matters Function: These sheaths cover bite valves to restore comfortable contact and consistent sip flow. Replacing old sheaths helps keep your bladder delivering water the way it was designed. Material and feel: Made from soft silicone for a comfortable mouthfeel that remains flexible over repeated use. Performance: Designed to preserve sip comfort during exertion activities and everyday use alike. Compatibility and fit Fits most hydration bladders and bite valves from a variety of brands and styles. Compatible with systems that use 360degree rotatable valves. Intended as a direct replacement for common bite valve sheaths; check your valve style for visual match before installing. Practical details Each contains four silicone bite valve sheaths for routine replacement or to outfit multiple reservoirs. Easy to install and remove for cleaning or swapping between uses. Use scenarios Day hikes and backpacking: Swap in a fresh sheath before a multiday trip to keep drinking comfortable and hygienic. Cycling and trail running: Comfortable sipping during fastpaced activity with valves that turn and rotate as needed. Gym and travel: Keep spare sheaths in a kit for quick replacement after heavy use or when sharing gear. What to expect A pack of four soft silicone sheaths that fit a wide range of hydration bladders, including those with 360degree rotatable valves, to help maintain comfort, hygiene, and consistent hydration performance.