The Forty Below® Bottle Boot™ is an insulating bottle cover designed to slow the freezing of water bottles in extremely cold environments.
- Fits most 1 Liter/32oz. quart size water bottles, such as Nalgene, German made Cold Weather bottle (Hunersdorf/KJS), Gatorade, Powerade, and others.
- Significantly slows down liquids from freezing in cold conditions
- Also keeps liquids cool in warm conditions!
- Velcro front closure with Grab-Tab - Easy to use with mittens or gloves
- No zippers to break or freeze
- Low Profile Design, packs small
- Does not absorb water
- Webbing belt loop