Stance Men's Seminole Socks, Black, Sock Size:10-13/Shoe Size: 6-12 40% Merino Wool/40% Acrylic/19% Nylon/1% Elastane Hand Wash 1" high 3" wide Native American textile design looking good long before the white man Seamless toe closure and y gore seam Elastic arch and ankle support and instep flex panel No lift heel grip consists of silicone pad printed on the achilles tendon area. This patent pending design provides kung fu grip to keep your heels locked in place.