-5% from 99€ -10% from 199€ -15% from 399€

Forty Below Bottle Boot 1L

Forty Below Bottle Boot 1L

Insulated sleeve for 1-liter bottles. Limits water freezing in cold weather and facilitates the transport of a Nalgene-type bottle.
€37.95

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Availability: In stock & Available in our store

The opinion of Aventure Nordique

The Forty Below Bottle Boot 32oz / 1L is an insulated sleeve designed to slow down water freezing in cold environments. It fits most 1-liter water bottles, including Nalgene 32oz and 1L bottles.


Made of 6.5mm thick closed-cell neoprene foam, this sleeve provides even insulation around the bottle. It limits the cooling of the liquid in winter conditions and can also help keep a drink cold in warm weather.


The front Velcro closure with a pull tab is easy to use even with gloves or mittens. The absence of a zipper prevents the sleeve from freezing shut. A webbing loop allows you to attach the sleeve to a belt, backpack, or carrying strap.

Points to remember

Used for decades, these insulating covers have proven their worth in the coldest conditions: high-altitude expeditions, Arctic conditions. They slow the cooling and freezing of liquids in cold weather but also keep liquids cool in warm weather.

Technical details

Brand Forty Bellow
Product name Forty Below Bottle Boot 32oz/1 Liter
Weight 104 g
Material Insulation: 1/4″ (6.5mm) thick stretchy nylon covered closed cell foam (wetsuit type material). Uniform thickness.
Additional information
  • 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
  • Fits: Bottles up to 3 3/4 inches in diameter and 8 1/2 inches tall. Stretchy material allows for some flexibility with different shapes of bottles.
Warranty 2 years
Country of Manufacture China

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