HeatStep™ Toasty Toes GuaranteedKeep your feet warm and cozy. Dont forget to get a few pairs for your family and friends its a unique gift idea. Features Thermally Insulated Integrated self heating technology keeps you warm at all times, even in extreme weather conditions. Moisture Wicking Efficiently regulates your body temperature, and the fleece that touches your skin feels dry and non sticky. Durable Densely woven on both sides, resistant to piling and fuzz formation.