This is what we like to call a “gamechanger” folks. These heated insoles from DIGITSOLE can heat up to 113º fahrenheit… SAY WHAAAT?!?! I need a pair for each pair of shoes I own on the double. Not only are these great for keeping your feet warm, but they’re waterproof, and accurately track your steps taken, distance walked, and calories burned. Only downfall? Just 8 hours of battery life.