Details The Darn Tough Hiker Boot Sock with Full Cushion has made a name for itself from the Pacific Crest Trail to the AT. "Must pack" durability meets undeniable comfort in a Full Cushion sock that absorbs the rigors of the trail. Material 66% Merino Wool, 32% Nylon, 2% Lycra® Spandex Length Boot Sock Height: Sits mid-calf for added protection and warmth. Details Performance Fit: No slipping, no bunching, and no blisters. Fine Gauge Knitting: Unprecedented durability and Darn Tough's 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. Naturally Antimicrobial: Repels bacteria and odor. Guaranteed For Life: No strings. No conditions. For life. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. True Seamless™: Undetectable seam fusion for an ultra smooth, invisible feel. Weight N/A Darn Tough Hiker Boot Sock Full Cushion Socks Men's