By surrounding a 32 oz. Nalgene (or similarly sized bottle) with both a 1/2 in. of closed cell foam and heat-reflecting foil layer, the Aquatherm helps to keep your water from freezing in cold conditions. The same technology can keep drinks nice and cool in the heat of the summer. Strap one or two of these on your hip belts for easy access during your winter treks. Features include a draw cord closure (doesn't freeze like zippers can) and a bombproof, 210-denier nylon outer shell and liner.
Note: Bottle not included
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