Welcome to our store! We present our electric insole, a perfect solution for keeping your feet warm during the cold winter. With a temperature range of 40-50°C, it provides instant warmth without freezing. It is designed with a USB power supply interface, so you can connect it to a mobile power source for convenience. The shoe size of our electric insole is suitable for 35-44 yards, and it can be customized to fit your specific needs. Safety is our priority, which is why we have adopted the 5V/2A low-voltage specifications, ensuring a safe and reliable experience. Compact and portable, our electric insole is suitable for both indoor and outdoor use. Product Information: - Product Name: Electric Insole - Material: EVA elastic fiber - Applicable people: Both men and women - Temperature: 40-50°C (specifically related to the environment) - Voltage: 5V/2A - Heating material: Far infrared carbon fiber Size Information: - Size 35 36 37 38 39 40 41 42 43 44 - Foot length (mm): 225 230 235 240 245 250 255 260 265 270 - Insole length (mm): 230 235 240 245 250 255 260 265 270 275 - 10 cm ≈ 3.94 inches Package includes: - 1 pair of USB heated insoles - 1 x USB cable 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.