Description_x000D__x000D_A pair of thermal socks will help you a lot in winter. This battery powered socks will do better than noraml cotton socks. Safe and durable electric power heating sock will help to make feets warm in cold weather. Help blood flowing smooth even in cold place. Very fashionable and practical._x000D__x000D_Feature_x000D__x000D_- Color: As shown._x000D_- Material: Cotton._x000D_- Heating material: nano carbon fiber wire, cotton socks._x000D_- Length of stockings: 31-33CM (36-43 yards)._x000D_- Size: About 99 x 22 x 1cm._x000D_- This item includes: 1 pair of socks, 2 pcs energy-saving battery cases (energy-saving battery box, IC with circuit control discharge), 2 pcs straps._x000D_- Battery pouch is attached to sock, powered by Six AA batteries (Not included). For 4-6 hours of continuous use under Energy Saving Mode._x000D_- It will not you heavily even being wet, but you had better do not let it wet on purpose._x000D_- Its heating temperature is up to 40 degrees and may last for hours even if you do not change the battery._x000D_- Warm socks will cover your foot, having much protection in thermal._x000D_- Free size fits most of people, it is stretchy and comfortable.Packing list1 pair x socks_x000D_2 x battery cases