Get free shipping and sales for the Thorlos Extreme Ski 2-Pair Pack Royal Blue Hosiery For extreme skiing, you need extreme comfort. You’re riding on Thor los country now friend. Features a sock designed for performance skiers who prefer a closer fitting boot. Ribbed cuff for stay-up comfort. Thermolite for maximum warmth and wicking. Feather-thin cushioning in shin protects from boot pressures. Thin cushioning in arch and flat knit instep maximizes ventilation, fit and comfort. Thin cushioning in ball/heel for shear protection and comfort. Over-the-calf length. Consists of 76% Thermolite , 22% nylon, 2% spandex. Machine wash inside out, do not bleach. Sold as a 2-pair pack.