Features: Adjustable: The heated socks come with three temperature settings that you can choose from according to your preference to keep your feet nice and toasty. Safety and Protect Your Feet: Heating elements of the battery heated socks made of insulated material no worries about heating safty. Material: Enjoy keeping your feet warm and cozy without having to worry about itchy material or bulky batteries. Have Fun: With these electric thermal socks you can cycling camping skiing or snowboard all you want without freezing. After-service: If you have any questions after receiving the product please feel free to contact us and we will provide you with a satisfactory answer. Specification: Material: Knit Length: 24-30cm Height: 24-37cm Temperature: 50 includes: 1 pair of * Socks(not contain battery) "