Fiber content: 82% THOR•LON® Acrylic, 17% nylon, 1% elastic. Constructed with THOR•LON® fibers for superior softness, resilience, durability and moisture-wicking for drier, warmer, better feeling feet. Thorlo - Maximum Cushion Low-Cut Tennis Socks | TMM Specifically engineered to deliver maximum protection and comfort for any player who is prone to blisters, foot pain or discomfort.