Features of the Carhartt Men's Force Grid Midweight Crew Sock Built with Force Technology to wick sweat, dry fast, and fight odors FastDry Technology keeps cool for all day comfort Dri-release yarns help manage moisture Temperature-regulating wool blend Enhanced heel pocket for a secure Fit Achilles' lock reduces heel lift Heel, arch, and toe cushioning Abrasion-resistant heel, arch, and toe yarns Raised grid pattern on arch helps manage moisture Ribbed channels improve ventilation on leg Fabric Details 46% Nylon, 45% Polyester, 6% Merino Wool, 3% Elastane