Looking for an ultra-light running sock that disappears when you put it on? Weighing in at a mere 13 grams per sock this is the lightest sock we make but still incredibly tough and comfortable. 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™: Undetectable seam fusion for an ultra smooth, invisible feel. SPECS Ultra-Light: Our lightest sock for race day or anyone looking for a lighter-than-air feel from a tougher than hell sock. No-Show Height: The toughest sock you’ll never see. When your shoes are on this sock is gone. 54% Nylon 41% Merino Wool 5% Lycra® Spandex CUSHIONING ULTRA-LIGHT WEIGHT: Our lightest sock for race day or anyone looking for a lighter-than-air feel from a tougher than hell sock.