High Performance Heated SocksThe heated socks are equipped with a pair of large 5000mAh batteries whose heating time is up to 10 hours. The heating elements cover the entire toe area and help focus the heat in the toes to keep your feet warm. The heating elements are made of carbon fiber which provides ecellent durability and safety standards. Perfect for arthritis in the feet and chronically cold feet and stiff joints. The heated socks can keep your feet warm all day long. MaterialMade of 78 cotton, 20 polyester, 2 spande material, the socks are absorbent, breathable, quickdrying, elastic thickened. Soft padded reinforced heel toe, and recessed heating elements help focus the heat in the toes to keep your feet warm. They are lightweight and not bulky while covering the calf. Smart APP Control If you are looking for the button inside the heated ski socks in the snow outdoors, you not only have to bend down, but also touch your ski pants or ski boots, which is a terrible eperience. If you have these heated socks with APP, you can adjust the temperature of the heated socks at will. Adjustable Temperature Setting These heated socks are designed with 3 heat settings, including high heatred 140150, 4.55.5 hours, medium heatgreen 130135, 67.5 hours and low heatblue 110115, 910 hours making these electric heated socks ideal for keeping your feet warm in winter. Unise heated socks, long cotton socks can cover the calf, fashionable design can match different clothes perfectly, so there is no need to worry about matching. The package includes 1 pair of heated socks, 2rechargeable batteries, 2USB charging cables, 1manual.