Darn Tough Women's Light Hiker Micro Crew Sock - 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 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 - the ultimate fiber for breathability and comfort in all conditions True seamless - undetectable seam fusion for an ultra smooth, invisible feel Light cushion Micro crew height 54% nylon/43% merino wool/3% lycra spandex Style: 1967