Crux Thermal Control Kit helps keep your water flowing freely, even in the most harsh conditions. Designed for reservoirs with the Quick Link system, this cold-weather accessory will extend the range of use your hydration pack during all outdoor adventures.\n\nFreeze-Proof Valve: Integrated cover keeps ice from forming in bite valveFits Reservoirs with Quick Link System CamelBak Crux Thermal Control Kit Onecolour | Buy CamelBak Crux Thermal Control Kit Onecolour here | Outnorth