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The Darn Tough Kelso Micro The Darn Tough Kelso Micro Crew Fatigue men’s sock offers a cool and silky feel and provides long-lasting energy. The hiking sock includes fine gauge knitting, true seamless fusion, fast action wicking, and is naturally antimicrobial. The micro crew height sock is made of 53% nylon, 44% merino wool, and 3% Lycra® spandex.
