Performance Fit: No slipping, no bunching, and no blisters. True Seamless: Undetectable seam fusion for an ultrasmooth, invisible feel. 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. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. Still made in Vermont, USA. Still unconditionally guaranteed for life. Darn Tough's mission is to create the world's best socks and stand behind them unconditionally. Darn Tough socks are the best merino wool socks for hiking, running, work, and everyday wear.