As the secret to keeping them warm this winter, these tall socks add light cushioning in just the right places, but stay breathable for better air circulation. Merino wool, added to this, assists with natural odor control and keeping a consistent temperature. . Made out of a 68% merino wool/30% nylon/2% elastane blend. . Lightweight cushioning added to shin and sole to absorb impacts and add warmth. . Flat knit toe seam reduces irritation. . Fits over the calf. . Knit in USA out of imported yarn. .