Made in USA A "true rib" jersey knit crew sock of the old-school variety, this sock has the great foot fit and stay of our technical socks. Our lightest weight sock, but designed to insulate for extreme warmth in cooler climates, and dry cool comfort in hot environments, with superior moisture regain properties, almost double the wicking of fine wool. (keeps your feet dry and sweat free) Exceptionally durable for outdoor activities or in your loafers on the way to work. Machine washable - These socks are incredibly easy to care for and due to their antimicrobial properties, feel free to wear them a few times before washing. But when they do need to be cleaned, simply machine wash warm, then toss them in the dryer. A blend of Bison down and merino wool, these socks are soft, long wearing and oh so comfortable. Very warm, very light and not restrictive. A "true rib" jersey knit crew sock of the old-school variety, this sock has the great foot fit and stay of our technical socks. It is insulating, soft and durable, and wicks moisture away like nothing you鈥檝e ever experienced. Our lightest weight sock, but designed to insulate for extreme warmth in cooler climates, and dry cool comfort in hot environments, with superior moisture regain properties, almost double the wicking of fine wool. (keeps your feet dry and sweat free) Exceptionally durable for outdoor activities or in your loafers on the way to work. Machine washable. 45% Bison/ 45% Preshrunk Merino Wool /7% nylon 3% Lycra spandex. These socks are incredibly easy to care for and due to their antimicrobial properties, feel free to wear them a few times before washing. But when they do need to be cleaned, simply machine wash warm, then toss them in the dryer. Colors available, Natural (Taupe), Black, Navy.