Darn Tough Hunt/Extreme Scent-Lok Over-the-Calf Extra Cushion - Men's 100% Wool 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; Naturally Antimicrobial: Repels bacteria and odor. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. Still made in Vermont, USA. Still unconditionally guaranteed for life.