Forty Below Bottle Boot
0.5 Liter size


Available in stock

Quick Overview

The Forty Below® Bottle Boot™ 0.5 Liter/16 oz. size is an insulating water bottle cover. It keeps water from freezing, especially in extreme cold environments. Please see below for additional information and specifications.

1st Color Choice *

2nd Color Choice *


The Forty Below® Bottle Boot™ Pint (16oz.)/.5 Liter 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.

Key Features Forty Below Bottle Boot .5 Liter/16oz. Size:
Thick Insulated Bottle Cover.
Fits most .5 Liter/Pint size water bottles.
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 nylon covered insulation.
No zippers to break or freeze.
Webbing belt loop.
Velcro front closure.
5 Sizes available!

Image of forty below bottle boot on sternum strap
Forty Below Bottle Boot on sternum strap.

Check out this review of the Forty Below Bottle Boot .5 Liter size from the ROBONZA: All About Mountain Gear Blog:

Please also see the pictures of them in use on the Product Photos Tab in this section.

Product Photo Gallery:

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Forty Below Bottle Boots 0.5 Liter in use:

Forty Below®  Bottle Boot™:   .5 Liter/ (16oz.) size

Insulation:  1/4″ (6.5mm) thick stretchy nylon covered closed cell foam (wetsuit type material).  Same thickness completely around the bottle.

Fits: most 16 ounce or 500ml water bottles.

Fits a bottle up to 3 inches in diameter, and 7 inches tall.  Stretchy material so it can flex with different shapes of bottles.

Weight: 3 oz (84g)

Colors: Black, Royal Blue, Red, Yellow, Pink, Purple, Green.

Additional information

Weight .4 lbs