Self-heating socks are made of , which are practical and durable. The bottom of the socks has a heating design, which can be heated in cold weather. The bottom has the self-heating principle of the soft glue with daily heating, with mild heat, and has a warm effect on the cold feeling of the feet. Features -Color:Assorted Color -Material:Cotton -Size:28.00X9.50X0.10cm/11.00X3.73X0.04in - These socks are suitable for work, sports, hiking, running, exercise, etc. cold winter. - Convenient to store, . Suitable for skiing, skating, climbing and cycling in the cold winter. - These socks are made of high-class cotton and are elastic, giving you a comfortable touch. - Thick, durable self-heating socks, suitable for men and women indoor and outdoor wear. - The bottom has the self-heating principle of daily heating soft glue, which has mild heat and warm the cold feeling of feet. Package list: 2 x Pairs of Heated Socks