Forty Below 32 oz / 1 L water bottle parka / boot holds one Hunersdorf Expedition 1 L water bottle or one 32 oz / 1 L Nalgene water bottle. Forty Below Water Bottle Boots / ParkasThis is the yellow 1 L / 32 oz size No zippers—can open with mittens on. But you need to ensure the seams are closed together tightly wen you put the water bottle back in, with the lid on the bottom because the ice forms on the top. With the upside down bottle, any ice that forms is on the bottom not frozen under the… Full review
Forty Below makes climbing equipment for extreme conditions.