The Darn Tough Solid Crew Lightweight Black men's sock provides comfort, durability and fit. The lightweight hiking sock features merino wool, fine gauge knitting, fast action wicking and true SeamlessT to offer an ultra smooth, invisible feel. The sock is guaranteed for life and is naturally antimicrobial. The no show height sock is built light, darn comfortable and super strong to provide a lightweight, sure fit. It comprises of 53% merino wool, 44% nylon and 3% lycra?Â« spandex.