Our Wool socks are made from 75% TurboWOOL, 15% Nylon and 10% Spandex. TurboWOOL is a superior blend of 50% Merino Wool and 50% PolyPropelene. This blend provides five times the strength and durability of Merino Wool alone. Shrink resistant and itch free, these Wool socks will keep feet dry and warm in all weather conditions. Cuff Height - 6" Feaures Easy-Fit™ Cuff Stretch-to-Fit™ Sizing System TURBOwool Deluxe Wool Blend is 5x stronger than Merino Wool alone Year-round performance: warmer in winter, cooler in summer