Superior fit and performance that top riders & skiers demand. Arch and ankle support with cushioning padding in just the right places. Choose from our cool comfort acrylic or our insulating IsolWool. Either way you've got your dogs wrapped in exclusive comfort formula that keeps your feet warm, dry and comfortable in the most demanding conditions all day long. Wool: 75% TurboWOOL, 15% nylon and 10% spandex.|Acrylic: 75% ultra-wicking micro denier acrylic, 15% nylon, and 10% spandex.