Lamb Wool USB Heating Insole Winter Electric Foot Warmer can be Washed USB Heating Insole Electric Heating for Winter Outdoor Ski Hunting 35-46 Shoe Size Product Description: *1. Uniform heating, high heat transfer efficiency, fast heating speed, soft and comfortable. *2. Easy to use. Just put on your shoes and turn on the power to enjoy the warmth. *3. Soft and comfortable, fine workmanship, ultra-thin design, maximum elasticity. *4. Use waterproof material, which can be cleaned directly. More convenient, cleaner, according to the free cutting line, insoles can be cut according to your shoes. *5. Lamb wool high-quality material, soft and comfortable. Product Specification: Product Name: USB insoles Material: Lamb wool Heating Material: Far Infrared Carbon Fiber Temperature: about 40 - 50℃ Voltage: 5V/2A Optional dimensions: 35-46 Packaging list: Insoles * 2 USB line * 1 Note: 1. All the pictures have been specially coloured, but due to the different lighting conditions and different display settings, there may be some deviations in the pictures and objects you see. Please understand 2. The data are measured by hand, and there may be some deviation, but it does not affect the use.