Special CLC "Comfort Zone" gel center provides maximum cushioning for all day wear ability. Crafted from 1680D Ballistic nylon and 3/4" foam for increased comfort. Two strap fastening for added stability. Breathable Neoprene lower straps secure below the knee for comfort all day long. Large. Low profile cap designed to prevent "roll-over" onto hard surface. Elastic upper straps with "buckle-style" fasteners for rapid fit.