The sock that made a name for itself from the Pacific Crest Trail to the AT. "Must pack" durability meets undeniable comfort in a Full Cushion sock that absorbs the rigors of the trail.Darn Tough Women's Hiker Boot Midweight Sock 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 is fast drying, breathable and odor resistant for all-day comfort. True Seamless™: Undetectable seam fusion for an ultra smooth, invisible feel.