Darn Tough Men's Lightweight Micro Crew Hiking Socks - Features increased breathability with mesh panels on top of the foot, a new smooth ribbing upper that stays put forever, and extended cushion over the Achilles - just a few heavy additions to one of the lightest hike socks out there. 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 Naturally Antimicrobial: Repels bacteria and odor Merino Wool is fast drying, breathable and odor resistant for all-day comfort True Seamless(TM): Undetectable seam fusion for an ultra smooth, invisible feel Micro crew is a shorter, more concise take on the traditional crew height peeks just above the top of a standard hiking boot 54% Nylon/43% Merino Wool/3% Spandex Style: 1972