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!