The CamelBak Crux Thermal Control Kit keeps your water flowing freely, even in the harshest conditions. This Control Kit takes insulation to the next level, so your tube and valve stay ice-free. It is 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. Keep your water flowing with the CamelBak Crux Thermal Control Kit! | CamelBak Crux Thermal Control Kit Tube