Cold feet should be reserved for such things as getting married or jumping off a cliff. Cold feet for hiking in the winter or just shoveling the snow is another matter entirely. Fortunately the ThermaCell Heated Insoles are designed to ensure that the feet stay warm even in the worst conditions. These are powered by a rechargeable lithium polymer battery that is embedded in the insoles and can provide heat up to 110 degrees, making for a hot foot you’ll be happy to have!