CamelBak Crux Thermal Control Kit Black. The new Crux Thermal Control kit takes insulation to the next level so your tube and valve stay ice-free. 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. Features/Specifications: o Insulated Tube: Protects the flow of your fluids in cold conditions o Freeze-Proof Valve: Integrated cover keeps ice from forming in bite valve o Fits Reservoirs with Quick Link System: Keep your Crux working hard year-round with this easy upgrade Specifications for CamelBak Crux Thermal Control Kit: Manufacturer: CamelBak Color: Black Package Contents: Camelbak Crux Thermal Control Kit CamelBak 1235001000: Crux Thermal Control Kit Black