PEDS Men's 6 Pack Quarter Socks with Coolmax 62% Polyester, 36% Coolmax Polyester, 2% Lycra Spandex Imported Machine Wash Color block heel and toe Coolmax technology helps keep your feet cool, dry and comfortable Lightweight and quick-drying Lycra fiber offers the ultimate in comfort and fit Satisfaction guarantee-if you are not completely satisfied with your PEDS product, simply return them to us for replacement