Ayla warm Girls Kids Boot socks are made of 25% Wool, 55% Acrylic,18% Polyester and 2% spandex. So they are soft, breathable, wearable. Keeping your feet warm and healthy . During cold weather it is important to your overall health, which is why we need soft, warm winter socks. These wool Knee High socks will keep your feet warm and comfortable all winter long