TAGVO Replacement Hydration Bladder Bite Valve with On/Off Switch Leak Proof + Hose Insulator Sleeve + Fixing Clip, Easy Cleaning Suck Valve Backup Accessory Kit Dishwasher Drinking Straw Mouth Piece ALL IN ONE KIT: a shut off bitemouth valves with anti-dust cover, a flexiable foam hose protector about 37.5" in length, and a clip for bladder hose fixing on backpack; NO LEAK BITE VALVE: this mouth piece has a on/off valve which is easy open and close to make sure that you are not leaking out your water when you are not drinking; SAFTY & HEALTHY: BPA free food grade silicone made with an anti-dust cover to keep the bite valve cleaning. it is dishwasher safe and easy cleaning; HOSE PROTECTOR: the protector is made of thick foam, ensure the hose and water in cool and keep from sun shine; EASY INSTALLATION: just slide the valve into the bladder tube. it would be a little tight to slide in and may need some force, but this eliminates leaking and excellent fixing.