Cold-weather activities call for the right cold-weather gear, especially for your neck and face. Made with a blend of 100 percent Merino wool and an interlocking knit, Smartwool's Thermal Merino Reversible Neck Gaiter provides everything you need: enhanced comfort, breathability, thermoregulation and odor resistance. Plus, it's double-layered for extra warmth and style, as you can get a totally different look on the reverse side. 100 percent Merino wool.10.25 inches.Machine wash, cold, gentle cycle; lay flat to dry.