56% Merino Wool/42% Nylon/2% Spandex FastDry® wicks away sweat Fights odor Temperature-regulating wool blend Heel, arch, and toe cushioning Achilles's lock reduces heel lift Enhanced heel pocket for secure fit Ribbed channels improve ventilation on leg Mesh instep for breathability Abrasion-resistant yarns in heel, arch, and toe Made in USAVendor Style Number: SB9740-W Carhartt Women's Midweight Wool Blend Boot Sock