About this item Cotton Material: Good water absorption, strong air permeability, thick elasticity and comfortable wearing. Cotton stockings are hand sewn with fine workmanship and also cover the calf, making them the first choice for warmth and style. 3 Speed Intelligent Temperature Control: The heating socks can be adjusted with three speed intelligent temperature, fast heating, long lasting heat preservation, and meet the needs of different groups of people. You can adjust the appropriate temperature according to different environments. High Safety Performance: This washable heating socks have been upgraded to use far infrared heating elements, which can heat up quickly, evenly and steadily, and with high safety. The socks have a long heating time and a large heating area. The heating element covers the forefoot area. New Upgraded Version: This new upgraded version of electric heating socks solves the shortcomings of not washing, uncomfortable fabric, long heating time and large heating area in the past. It is the best choice for warming feet in winter. Washable and Reusable: The power interface of our heated electric socks is insulated and waterproof, can be washed repeatedly, and is safe and reliable. The battery pouch is small and easy to use. Cotton Material 3 Speed Intelligent Temperature Control High Safety Performance New Upgraded Version Washable and Reusable