Midweight padding added at the ball and heel for extra protection against blisters, shock, impact and abrasion. Moisture wicking THOR-LON® Acrylic keeps feet drier. Reinforcing nylon is knit to the outside of the sock providing outstanding durability.Lightweight padding in arch cushions and supports arch and allows for a better fit.Flat knit at instep for a better fit and moisture evaporation.Fiber Contents: 82% Exclusive THOR-LON® Acrylic, 10% Stretch nylon, 4% polyester 4% SpandexSize 11 (Mens 5.5 - 8.5; Womens 6.5-10), Size 13 (Mens 9 - 12.5; Womens 10.5 13), Size 15 (Mens 13-15)