Carhartt WA001 Womens Work Dry Merino Wool Blend Graduated Compression Boot Sock. 55% acrylic, 24% nylon, 19% merino wool, 1% lycra spandex, 1% other fiber. Technically engineered top helps reduce leg fatigue. Mid calf length, midweight sock. Fully cushioned foot and lower leg for comfort. 20 denier spandex for ultimate fit properties and stay up top. Spandex reinforced arch support for fit. Fabric blend regulates temperature and keeps feet dry. Mesh cooling channels and panels for better breathability and moisture transport. Reinforced heel and toe. "No feel" toe seam. Anti-odor fabric treatment provides freshness protection.