Our Smartwool Hike 5 Panel Hat brings packable comfort to days spent on the trails. The lightweight, recycled stretch-woven fabric with a quick-dry finish helps keeps sweat from interrupting your hike, with targeted mesh zones designed for added breathability. With the moisture management, temperature regulation, and odor resistance of Merino with TENCEL™ Lyocell fiber working together in the headband liner, you've got everything you need to keep your noggin' feeling good.