Keep Your Foot Warm -Our far infrared heated insoles,it can provide enough heat to keep your foot warm for a long time,they don't heat the feet.Perfect for anyone who wants to keep their feet warm and warm in winter. High Quality -Our USB Heating Insoles are made of super soft EVA elastic fiber, durable and not easily deformed, have large heating area and even heat distribution, keep your feet more comfortable and warm, say farewell to the cold. Safety -Low voltage, our heated insoles' standard output is 5V/2A, you can charge it with computer, power bank, power adapter. Our heated insoles are washable, please dry them before use. One Size -- Size: 41-46, our heated insole can be easily cut to size for your shoe, you can also cut the insoles for a perfect fit according to the size guide, it fits all The sizes foot and many kinds of shoes.It is quite light and thin, does not take up too much space in your shoes, and makes your shoe more heavy. Widely Used - Our Foot Warmers can solve all your cold feet problems in winter and cold weather. Very suitable for hunting, fishing, skiing, snowboarding, hiking, camping, police, rescue workers, cycling and cold in the house, etc. Keep Your Foot Warm -Our far infrared heated insoles,it can provide enough heat to keep your foot warm for a long time,they don't heat the feet.Perfect for anyone who wants to keep their feet warm and warm in winter.