Constructed with THOR•LON® fibers for superior softness, resilience, durability and moisture-wicking for drier, warmer, better feeling feet. Fiber content: 85% THOR•LON® Acrylic, 14% nylon, 1% elastic. Cushioned instep and arch for a better fit, more support and less pressure on feet for a more comfortable game. Thorlo - Maximum Cushion Ankle Tennis Socks | TMX Specifically engineered to deliver maximum protection and comfort for any player who is prone to blisters, foot pain or discomfort.