Have you ever been skiing or out in the cold and your phone's battery suddenly goes down and your phone dies? This is such a common problem that we felt there needed to be a solution. Instead of getting overly fancy, we concentrated on functionality. All you need are hand warmers readily available at any ski shop or online. Stick those hand warmers in the pouches that are custom designed to hold them, shut the flap, and your phone will never die again, leaving you stranded on the mountain or when you need it most outside in the cold.