Feature: Material:cotton and silicon gel Size: One Size Fit All It is soft and comfortable, more durable for use. It will keep your feet feeling fresh. It is one of good choice to relax your self. Package included: 1 Pair x Spa Sock Warm Tips: Please clean your feet and hands each time before using the socks. For the better effect, please use the socks for 3-5 times a week, each time for about 20-30 minutes.