No-Rub toe seam will not irritate your feet. Unique elastic bands in the arch provide support you can feel. Scuptured fit in the heel, forefoot and, instep provide excellent fit and keep sock from sliding. Fibers are chosen for performance and durability resulting in a sock that wears for years. Exclusive Thor-Lon fibers wick moisture to keep your feet dry. Padding is clinically shown to reduce pain, pressure, blisters, and moisture. Features Thorlo legendary padding in the heel and forefoot. Designed for the athlete who wants cushioning and a great fit. Machine Wash. No Closure closure. Made in the USA. 76% Exclusive Thorlon Acrylic , 4% Spandex , 18% Nylon , 2% Polyester.