- This sock lets modern ski boots work to their highest potential. The shin is padded with a special yarn woven from three different yarns. The toe area has a small amount of padding to help feet stay warm and comfortable. The foot-top and back of the calf areas are Aireator mesh to help the sock stay dry. Made from CoolMax, the Ski D is a great sock for aggressive, all mountain skiers that have close-fitting boots.