Details The Darn Tough Tactical Boot Cushion Sock is one of their most versatile sock. Dense, resilient terry loop cushioning surrounds the calf, foot bottom, and toes. Elastic arch support for a snug, performance fit. Reinforced toe and heel for increased durability. Material 62% Merino Wool 36% Nylon 2% Lycra® Spandex Length Boot Height: Sits mid-calf for added protection and warmth. A sturdy companion. Details Cushion: Mid-level cushion density under foot. A warm and ultra-comfortable choice when conditions demand it. 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. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. True Seamless™: Undetectable seam fusion for an ultra smooth, invisible feel. Darn Tough Tactical Boot Cushion Sock