Heated SocksOur rechargeable heated socks are equipped with two 5000mAh lithium-polymer batteries which can give you warmth for 6-12 hours. Heat evenly 360 degrees, so you can comfortably do whatever you do Soft, Comfortable and DurableThe heated socks are made of safety material. Thanks to the specially designed breathable, quick-drying flame retardant cotton, you will feel more secure during use. It is more important that the infrared heating elements of the heated socks can stimulate blood circulation.3 Adjustable Temperatures Heated socks with 3 temperature adjustment functions, contains high temperature (149F, 5-6 hours), medium temperature (131F, 7-8 hours) and low temperature (113F, 10-12 hours). You can adjust the heat you need based on hot and cold conditions.Convenient DesignThe socks come with two batteries. To improve comfort, we designed the battery to be curved and lighter. Compared to other battery types (cylindrical) on the market, our battery has a smaller feel and can be worn with boots.One SizeOur heated socks have strong elasticity, free size for unisex, suitable for most people. A great winter gift for yourself, family and friends. Machine washable, please put the heated socks in the provided laundry bag before washing to prevent the charging cable from being torn.