Bottle Boot 1 Liter

The Forty Below® Bottle Boot™ 1 Liter/32oz. quart size, is a very insulating water bottle cover, to help keep water from freezing, especially in extreme cold environments. Used on expeditions worldwide for over 3 decades.  This insulated bottle cover is a unique design that enables the user to easily open with mittens or gloves, with easy access to the bottle, and no zippers to break or freeze. FEATURES Fits most 1 Liter/32oz. quart size water bottles, such as Nalgene, Hunersdorf, etc. Helps keep liquids from freezing in cold conditions. Helps keep liquids cool in warm conditions. Low Profile Design. Thick 6.5mm Closed Cell Neoprene foam insulation. No zippers to break or freeze. Webbing belt loop. Velcro front closure.