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.Specifications and Features: No slipping, no bunching, and no blisters. Pulls moisture away from skin. Fast drying. Cool in the summer, warm in the winter. Repels bacteria and odor. The ultimate fiber for breathability and comfort 54% Nylon 43% Merino Wool 3% Lycra Spandex