"Winter Gear Guide 2019: Hot Picks for Cold Weather Adventure" - Blue Ridge Outdoors, February 2019

This waterproof thermal phone koozie, constructed of NASA-inspired materials, is cold-proof, heat-proof, drop-proof, and sink-proof (it floats!). By maintaining a constant temperature for your phone, it provides up to three times longer battery life, too. Yet it’s ultralight and slim, easily sliding into pockets.

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