The Forty Below® Bottle Boot™ 24oz size, is a very insulating water bottle cover, to help keep water from freezing, especially in extreme cold environments. This insulated bottle cover is a unique design we make that enables the user to easily open with mittens or gloves, with easy access to the bottle, and no zippers to break or freeze.
The Forty Below® Fuel Bottle Boot™ in 11 oz. size helps insulate and enable a better grip on metal bottles. Three sizes available: 11oz., Half Liter, and Liter.