Darn Tough Men's No Show Ultra Lightweight Running Socks - Get out the headband: it’s time to mop up with this ground-up redesign. Performance Fit: No slipping, no bunching, and no blisters Fine Gauge Knitting: Unprecedented durability and the 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 Merino Wool is fast drying, breathable and odor resistant for all-day comfort True Seamless™: Undetectable seam fusion for an ultra smooth, invisible feel 55% Nylon 40% Merino Wool 5% Lycra® Spandex Style: 1039