The Classic Men?s Merino Crew is a single-layer jersey knit base layer built from 100 percent merino wool in a 5-ounce fabric weight. Made with 17.5-micron fibers, it provides a soft feel with natural warmth and stretch for a snug, comfortable fit. Design details include a modified raglan yoke shoulder, self-fabric cuffs, and a drop-tail hem for added coverage.