Lightweight and naturally odor resistant, EMS X-Static liners wick moisture with a great fit. . 60% polypropylene, 19% X-Static nylon, 18% stretch nylon and 3% elastic. Designed to be worn as a base layer under athletic socks. Silver infused X-Static nylon protects against fungi and bacterial growth. Thermal conductivity keeps feet at a steady temperature. Smooth, flat toe seam. 87839041060 18190900021 4101