When your phone gets too cold its battery drains faster and if it's really cold, it might even shut off. That's where the Phoozy ($30) comes in.
A simple sleeve or "capsule" for smartphones, the Phoozy has a Chromium Thermal Barrier Shell and SpaceTech Penetration Layer, as well as a bit of velcro to keep it closed at the top. That will help keep your phone warm on extra cold days and help preserve battery life. It will also keep your phone from overheating.
Phoozy pouches now come in a few different versions and sizes. I personally like the original, which starts at $30 and fits most phones up to 6.1 inches. The newer XP3 ($50) is larger and designed for 6.5-inch or larger phones.
See the CNET list here.
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