We've employed super soft Merino wool and Coralast abrasion resistant fibers to engineer an ultra-comfortable, long-lasting work sock. Revolutionary comfort-stretch top yields to the shape of the leg without falling, pinching or binding for a superior never-know-its-there feel. Compression arch and ankle stabilizers keep socks securely in place. It's a real tough sock with a super-soft side.. . . . . 69% Wool, 28% Nylon, 2% Acrylic, 1% Elastane. Boot height; FastDry wicks away sweat; fights odor. Temperature-regulating wool blend; heel, arch, toe, instep and leg cushioning. Arch support; mesh instep for breathability. Abrasion-resistant yarns in heel and toe. Steel toe protection.