Merino wool/nylon/polypropylene/lycra/elastane/polyester Twin knit combines a durable exterior with a moisture-wicking interior, utilizing zoned performance to keep your feet warm and dry Form-fitting True Rib leg will stay put without compression Moisture-wicking, odor resistant and temperature-regulating wool blend Heel, arch and toe cushioning Arch support Enhanced heel pocket for secure fit Ribbed channels improve ventilation on leg Abrasion-resistant yarns in heel, arch and toe Stretch top stays put and reduces tension Steel toe protection Imported