Thorlos Maximum Protection Level 3 Ski Socks SKX-13. These socks are designed with cushioning and moisture-wicking technology to keep your feet dry and comfortable. Made with 61%Ther-Lon Acrylic, 37% Insulating Hollow-core Polyester and 2% Spandex material, these socks are durable and breathable, perfect for any skiing occasion. The over-calf length and unisex design make them suitable for any adult skier looking for high-performance socks. Available in gray and black, these original Thorlos ski socks are brand new with tags.