Exclusive THOR-LON® construction for resilience, durability and better wicking.Thick cushioning in the ball/heel for maximum shock, impact, shear and blister protection.Moderate cushioning in shin and instep protects against abrasion and boot pressure.Moderate cushioning in arch for better fit and comfort.Spandex top holds in place all day.Fiber Contents: 85% Exclusive THOR-LON® Acrylic, 14% Stretch nylon, 1% SpandexSize 9 (Womens 4-6)Size 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)