Merino Wool Outdoor Trail Socks - 4 Pack 71% Merino Wool Made in USA Includes 4 pair of super soft merino wool sport socks 71% Merino Wool / 21% Nylon / 7% Polyester / 1% Lycra Spandex Wicks away sweat and moisture Size - Medium (Men's shoe 4-8) (Women's shoe 5-9) Cushioned throughout and reinforced from heel to toe