Winter Warm 3V Thermal Cotton Heated Socks Men Women Battery Case Battery Operated Foot Warmer Electric Socks Warming Socks Set 1.Electric socks, cotton material, breathable, brisk drying, versatile thickened, electric modules utilizing slender, delicate. 2.Electric Heated Socks For Chronically Cold Feet. 3.Incredible for chasing, ice angling, climbing, and brandishing occasions. Won't stun, notwithstanding when wet. 4.Cushioned strengthened rear area and toe, and recessed warming component enable concentration to warm in the toe to shield your feet from getting cool. Usage: 1.Put 4 AA batteries into two battery boxes please use rechargeable more than 1500MAH AA Battery. Or else you may find the socks don't heat. 2. Connect the socks plugs to the battery boxes, turn on (there is a swich on the battery box), feel the front instep of the socks and in one on two minutes.you can feel they're heating. 3. We advise you wear a pair of thin stocks inside first, then wear the heated stocks outside, put the battery boxes with batteries inside into battery pockets on the sock. turn on the switch, connect to socks' plugs, and your feet will feel warmer. Caution: Turm off the switch on the battery boxes when not be used or in case of excessive temperature Washing: It is better that the heated socks are washed by hands, but the battery box doesn't put into the water. Package list: 1 pair of electric socks 1 pair of 3V DC battery compartment (without batteries) Gyfdym Winter Warm 3v Thermal Cotton Heated Socks Men Women Battery Case Battery Operated Foot Warmer Electric Socks Warming Socks Set