Made from Thermolite polyester, these socks hold in heat without the bulk. Great just-for-kids fit. Wick Dry technologykeeps feet dry and comfortable. Fully thermalined shin, sole and toe absorbs shock and insulates. Smooth, flat toe seam adds comfort and durability. Memory-knit construction holds it's form wash after wash. 57% nylon, 41% Thermolite polyester, 2%spandex. Lightweight, over-the-calf ski sock.