USWE Quick Coupling Set for Hydration System V-101007Body and Insert quick seal coupling for a quick and spill proof removal of drink tube allowing you to refill your hydration bladder without rerouting your drink tube through your hydration pack. This coupling set also fits to the USWE Helmet handsfree kit kit. For best function and durability the Body and Insert couplings will need some love (cleaning) after each use. Always make sure that the o ring is wet before connecting the Body and Insert.