The Darn Tough Static Lightweight Crew women's sock lets you sit and commute all day in breezy comfort. The sock features merino wool, fine gauge knitting, fast action wicking and true SeamlessT to offer an ultra smooth, invisible feel. It is guaranteed for life and is naturally antimicrobial. The crew height sock is built light, darn comfortable and super strong to provide a lightweight, sure fit. It comprises of 63% merino wool, 35% nylon and 2% lycra?Â« spandex.