Over the calf motocross sock. Compression construction offers arch and ankle support. Thick padding for ankle to toes for superior support. Pill-resistant yarns protect against boot hook-and-loop snagging. Ribbed cuff openings ensure socks always stay in place. US/UK: 45% cotton, 35% nylon, 10% elastic, 9% polyester, 1% Spandex. Youth model.