PEDS Men's 6 Pack No Show Big & Tall Socks with Coolmax 98% Polyester, 2% Lycra Spandex Imported Machine Wash No-show style ensures a barely there look Coolmax technology helps keep your feet cool, dry and comfortable Lightweight and quick-drying Lycra fiber offers the ultimate in comfort and fit, 62 percent polyester, 36 percent coolmax polyester, 2 percent lycra spandex, exclusive of elastic Satisfaction guarantee-if you are not completely satisfied with your PEDS product, simply return them to us for replacement