Comfortable & Warm Socks This heated sock are made of cotton-polyester blend material, soft and breathable, elastic and quick-drying qualities. Oure lectric heated socks are designed to fit both for men and women between sizes 6-14, Whether it is winter sports or outdoor activities, get ready for winter with our heated socks - embrace the warmth and comfort. 3-Levels Temperature Controller This heated socks is equipped with a convenient and easy-to-use 3-levels setting heat controller, which can adjust the adapted temperature according to your needs and stimulate your blood circulation. Whether you need a higher temperature to fight the severe cold, or just need a slight heating to keep comfortable, it can meet your needs. 7.4V Rechargeable Design The rechargeable heated socks with a 7.4V 3000mAh rechargeable design, this heated sock is very convenient to use. Just connect the socks to the charger to charge, and you can enjoy the long-lasting heating effect than 3.7V&5V.