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Forty Below Bottle Boot

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Insulated Bottle Cover that is easy to use with mittens or gloves on, low profile so it does not take up too much room, and won't absorb water as it is made of closed cell foam insulation.  Used on expeditions around the world for many years.

  • Helps keep liquids from freezing in cold conditions.
  • Helps keep liquids cool in warm conditions.
  • Low Profile Design.
  • Closed Cell Neoprene foam insulation.
  • No zippers to break or freeze.
  • Webbing belt loop.
  • Velcro front closure

Note: Assorted colors available. Colors will vary.

Product Details
  • Insulation:  1/4" thick stretchy nylon covered closed cell foam (wetsuit type material).  Same thickness completely around the bottle.
  • Size - .5L: Fits most .5 Liter/Pint or 16oz Nalgene Bottles.  Fits a bottle up to 3" in diameter and 7" tall. (Weight 3oz (84g))
  • Size - 1L: Fits most 1 Liter/Quart such as 32oz Nalgene, Hunersdorf 1000ml, or 32oz Gatorade bottles.  Fits bottles up to 3.75" in diameter and 8.5" tall. (Weight: 4.5 oz (126g))
  • Size - 48oz: Fits the tall Nalgene brand 48oz water bottle, Nalgene 32oz and 48oz Flexible Canteen, 32 oz thermos.  Fits a bottle up to 3.5" in diameter and 12.5" tall. (Weight 6.5oz (182g))
  • Colors: Black, Blue, Red, Yellow, Pink, Purple, Green

Easy Returns

For all eligible items, we will gladly accept the return or exchange of new items within 30 days of the original shipment date of product for a full refund.

Free Shipping

Free shipping on orders over $150! We use UPS and USPS, and send tracking info as soon as your order is shipped.

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Bottle Boot

Bottle Boot


Customer Reviews

Based on 2 reviews
Myles Regan
The Red Warmer

It's great little bottle wrap, well-made wet suit material cover.

The tried and tested Nalgene insulator

Not a better solution for simple, easy to use year-round Nalgene bottle insulation…it just fits the need.