Heated insole: keep feet warm in cold weather - heat is evenly distributed for optimal circulation to the feet The heater is suitable for use with a USB interface. USB jack, one end of the USB power cable is connected to the USB port of the computer and the other end is connected to the insole. It can be put directly in the shoes for easy access, just put on the shoes and plug in and enjoy the warmth. Safety and energy saving. Ideal for keeping your feet warm in winter. The standard performance of the heated sole is 5V/2A. The heating pad can be cleaned. Dry it before use. You can wash it with water for recycling, but keep the connector away from water when connecting to USB power. The heating pad can be cleaned. Dry it before use. You can wash it with water for recycling, but keep the connector away from water when connecting to USB power. Electric heated insoles for men and women for skiing and other snow sports. Worker, winter outdoor travel and skiing. Also resists the cold in the home. Outdoor riding. People who work in the cold.