Details Coolmax® comfort and the perfect amount of cushioning converge in Darn Tough's rugged trail legend the Darn Tough Coolmax Boot Cushioned Boot Sock. The result: mile after mile durability in a hiking sock that can stand the heat. Material 35% Coolmax® Polyester, 34% Nylon, 28% Acrylic, 3% Lycra® Spandex, 1% Other fiber Length Boot Sock Height: Sits mid-calf for added protection and warmth. Details Performance Fit: No slipping, no bunching, and no blisters. Fine Gauge Knitting: Unprecedented durability and Darn Tough's 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. Coolmax®: Engineered to move moisture away from your skin and dry fast in warm conditions. True Seamless™: Undetectable seam fusion for an ultra smooth, invisible feel. Weight N/A Darn Tough Coolmax Boot Sock Full Cushion Socks Men's