Darn Tough Men's Heavyweight Hunting Socks - Be prepared for the cold. These will keep you dry, and warm when you lose the sun. Performance Fit: No slipping, no bunching, and no blisters Fine Gauge Knitting: Unprecedented durability and our unique "put it on, forget it's on" feel Fast Action Wicking: Pulls moisture away from skin Fast drying All Weather Performance: Cool in the summer, warm in the winter True Seamless(TM): Undetectable seam fusion for an ultra smooth, invisible feel Boot socks sit mid-calf for added protection and warmth 79% Merino Wool/19% Nylon/2% Lycra(R) Spandex Cushioned terry loops running the length of the sock