Battery Heated Socks: Heated socks equip with 2 battery boxes, each battery box powered by batteries (included), heating time up to 5 hours. The battery on these electric socks is easily removable and unobtrusive so you dont have to deal with extra weight. Safety and Protect Your Feet: Heating elements of the battery heated socks made of insulated material, no worries about heating safty. Comfortable heating temprature lets your feet no longer be cold and stiff in the cold winter. Soft and Breathable: Electric heated socks are made of premium polyester mix fiber, soft, breathable, and elasticm, which is skin friendly. Enjoy keeping your feet warm and cozy without having to worry about itchy material or bulky batteries. Necessary for Winter: With the electric heating socks, you can enjoy your fishing, camping, snowboarding, hunting, hiking, skiing, snowboard, and outdoor work, etc. The winter battery socks is a considerate gift for your parents, friends and family. One size for most people.