Heated Electric Thermal Winter Socks Heated socks controlled remotely with improved app Most heated socks are controlled by a battery placed in the sock itself. But our heat sock can be adjusted manually or controlled via the app, so you can turn it on or off at any time. Especially useful when you are traveling. (Android/iOS is compatible with controlling heated socks through the app.) No batteries to buy on your own included Warm up in 30 seconds In these rechargeable heated socks, we use composite fiber heating elements that are spread over the toes and heat up quickly, and the temperature can be felt within 30 seconds. Keep your feet warm and speed up blood circulation. Perfect for people with arthritis, poor circulation, and stiff joints that facilitate blood flow throughout the body. Adjustable electric heating socks The 3 heating settings make it easy to change between wanting your feet to be slightly warm and cozy — a useful feature for those who tend to overheat/cold. The battery must be fully charged before use. High temperature (139F, 3 indicator lights on), average temperature (126F, 2 indicator lights on) and low temperature (50F, 1 indicator light on). Soft and breathable insulation material Our heated socks are made of cotton spandex fabric and nylon material. The moisture-wicking material is particularly stretchy and keeps sweat away from your skin. Keep your cold feet dry, comfortable, and warm in cold weather. Good choice If you are really looking for the highest quality heated electric socks for every cold day. You can't go wrong with our electrically heated socks.