Features: Heating and warmth: three-step temperature regulation, fast heating, good warmth retention, moisture absorption and ventilation, fast warming of feet. Three gear temperature regulation: intelligent constant temperature does not burn the feet. Adjust three gears according to the required temperature. Carbon fiber heating wire: Rapid heating of carbon fiber heating wire. Soft comfort for feet, elasticity. Used for outdoor winter sports, such as skiing, hiking, hunting, snowshoes, fishing, cycling, cycling and so on. Package Includes: 1 Pair Heated Socks Specifications: Material: Nylon Weight: 150g Size: 36-43 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.