For extremely cold and wet days. This extra heavy over-the-calf hunting sock, along with our entire Hunting line, was made using WOWÃ¢â€žÂ¢ Technology. Features our original technical fit system that allows the sock to flex without bunching. Features: 3x1 ribbed leg, heavy full cushion leg and foot, SmartWoolÃ‚Â® Fit System with arch and ankle support, flat knit toe seam, WOWÃ¢â€žÂ¢ technology Icon. Knit in USA of imported yarn: 80% Merino Wool, 19% Nylon, 1% Elastane. Color: Gray/Red; Sizes (shoe size): M (6-8.5), L (9-11.5), XL (12-14.5).