Possum Merino 2-Tone Unisex Socks 20% nylon Black ribbed, every day socks with contrast color heels and toes for men or women Made in New Zealand from a luxurious blend of Possum Merino Wool for all seasons wear Superbly soft and warm, yet so light in weight; Mid-calf height 70% Possum Merino Wool with 20% nylon, 8% silk, 2% Lycra for shape retention & durability Sizing is in Womens sizes, eg 8-12 US (Women) is 7-11 US (Men)