This pair of electric heated socks is made of cotton, soft, breathable, and elastic, which is skin-friendly, keeping your feet warm and cozy. With the heating elements of the battery-heated socks made of insulating material, there are no worries about heating safety. The socks are powered by 2 x AA batteries (not included) and can keep your feet warm in seconds. This product is perfect for outdoor sporting events such as hunting, skiing, and mountain climbing. It is also a great gift for parents, friends, and family to keep them warm during the cold winter months. Features: 1. Keep Your Feet Warm: Heated socks can keep feet comfortable and warm in cold weather or extreme operating temperatures. One size for most people. 2. Soft And Breathable: Electric heated socks are made of premium cotton, soft, breathable, and elastic, which is skin-friendly, keeping your feet warm and cozy. Better than wool socks, doesn't itch like wool, and is warmer. 3. Safety To Use: The heating elements of the battery-heated socks are made of insulating material, no worries about heating safety. Comfortable heating temperature lets your feet no longer be cold and stiff in the cold winter. 4. Battery Powered: You just put 2 x AA batteries (not included) into the battery box correctly, and press the ON/OFF, you will feel warm in a few seconds, this is very friendly for elder people. 5. Necessary for Winter: With the electric heating socks, you can enjoy your fishing, camping, snowboarding, hunting, hiking, skiing, snowboarding, outdoor work, etc. The winter thermal socks are a considerate gift for your parents, friends, and family. Specification: Material: Cotton Product Color: Black Battery: 2 x AA Battery (Not Included) Product Size: Tube Circumference: 16-31cm, Tube Height: 24-37cm, Sole: 24-30cm Product Weight: 150g Package Included: 1 x Heating Socks