These ultra-lightweight liners made with X-Static help eliminate odor in the sock. The silver coated nylon will also assist in minimizing static and regulating temperature for the life of the sock, wash after wash. Silver-coated nylon helps eliminate odor naturally and inhibits bacteria growth in the sock Smooth, flat comfort toe seam 67% polypropylene, 25% nylon, 5% X-Static nylon, 2% polyester, 1% spandex Style #4101