The insulator keeps your liquids from freezing in harsh conditions. Perfect for winter backpacking, this essential companion allows filling a wide-mouth Nalgene bottle with heated liquids. Its design maintains warmth, even when temperatures plummet. Crafted with Dyneema Composite Fabrics and Thinsulate, it delivers durability, lightweight performance, and superior insulation. A secure Velcro strap attaches to a pack's hip belt, making it ideal for backcountry adventures where hydration is crucial.