Warm like like only wool can be, the Men's Merino 3 Crew from Patagonia is made with 6.9-oz 100% merino wool that has an extra-fine-gauge yarn for softness and a jersey-knit construction for durability. Patagonia's go-to fall/winter merino layer, Merino 3 naturally resists odor, moves moisture away from the skin, regulates body temperature, and stretches to accommodate your every move. With a self-fabric collar and offset seams for greater comfort, and underarm panels for maximum range of motion. Slow-washed for next-to-skin softness. Machine-wash cold; lay flat to dry.