Ideas In Motion Battery Operated Heated Socks Heated socks are made to keep feet warm, but not hot. Turn on heat only after you begin to feel cold. Turn socks off and on for best results. Do not overheat feet. If you prefer to wear two pairs of socks, the heated socks should be next to the skin. Available in Small (Mens 6-9), Medium (9-12 Women 10-13 Mens — Large (Mens 13-15) Do no machine dry, hand dry or towel dry. Do not wring. PROPER USE FOR OPTIMAL HEAT: HEATED SOCKS are made to keep feet warm, but not hot. Turn on only after you begin to feel cold. Turn socks off and on often for best results, Do not overheat your feet. If you prefer to wear two pairs of socks, the heated socks should be next to the skin. Fabric: 80% cotton, 20% spandex.Requires 3 x AA batteries( not included) for each sock. Additional Details ------------------------------ Product description: Ideas In Motion Battery Operated Heated Socks Heated socks are made to keep feet warm, but not hot. Turn on heat only after you begin to feel cold. Turn socks off and on for best results. Do not overheat feet. If you prefer to wear two pairs of socks, the heated socks should be next to the skin. Available in Small (Mens 6-9), Medium (9-12 Women 10-13 Mens — Large (Mens 13-15) Do no machine dry, hand dry or towel dry. Do not wring. PROPER USE FOR OPTIMAL HEAT: HEATED SOCKS are made to keep feet warm, but not hot. Turn on only after you begin to feel cold. Turn socks off and on often for best results, Do not overheat your feet. If you prefer to wear two pairs of socks, the heated socks should be next to the skin. Fabric: 80% cotton, 20% spandex.Requires 3 x AA batteries( not included) for each sock.