Material: CottonHeight: 34-45cm/13.4-17.7inchLeg bottom: 20-30cm/7.9-11.8inchHeating temperature: 40-50CHeating position: Stockings: Sole of feetApplicable people: unisexfeature:1. Intelligent control infrared heating heating socks, suitable for long-term cold feet.2. Recessed heating elements help focus heat on toes and prevent feet from getting cold.3. Adjustable temperature: 38~45C,4. Soft skin-friendly fabric, densely knitted, breathable, absorbent, and quick-drying.5. Thickened elastic, free size.6. Lithium-ion large-capacity lithium-ion battery heating, convenient heating, continuous warmth7. Suitable for skiing, ice fishing, hiking, mountaineering and sports in cold areas, also can be used in wet places.way to heat up:1. Powered by lithium-ion battery (2*2000mAh)2. The sock interface is directly connected to the battery, plug and heating