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.