If you redesign one of the most popular socks in the line you better come correct. 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. FEATURES 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. Guaranteed For Life: No strings. No conditions. For life. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. True Seamless(TM): Undetectable seam fusion for an ultra smooth, invisible feel. SPECS Light Cushion: Light and strong with a thin layer of cushioning along base of foot. Our most versatile construction. Micro Crew Height: 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% LycraA(R) Spandex SIZING: Mens Womens Euro UK S 4.5-7 35-37/38 2.5-5 S 5.5-7.5 M 7.5-9.5 38-40/41 5-7 M 8-9.5 L 10-11.5 41-42/43 7.5-9 L 10-12 43-45 9.5-11.5 XL 12.5-14.5 46-49/50 12-14 XXL 15-17 50-53 14-16 Kids S 9-11.5 M 12-2.5 L 3-6 SOCK HEIGHTS: