The Drymax Running Lite Mesh quarter crew socks can be used for casual or ultra-distance runs. They are engineered underfoot with plush feeling terry loops for miles of comfort. The proprietary Drymax® Dual-Layer Sweat Removal system will keep your feet drier and blister-free. Additionally, mesh stripe vents over the foot and under the arch provide remarkable breathability, helping keep feet cooler, drier, and comfortable. They are made in the USA. 46% Drymax/Olefin, 38% Polyester, 8% Elastane, 7% Nylon.