The Arcteryx Rho LTW Beanie works under a helmet or looks great on its own. Made with 95% Mountain Merino Knit Wool/ 5% Spandex, the Rho LTW Beanie has all the wicking, odor-control, and insulating properties of wool with comfortable stretch. Six dart construction of this Arc'teryx hat ensures a comfortable fit with better anatomical shaping to eliminate pressure points. Other features include a double layered headband and embroidered Bird log on the side. The Arcteryx Rho LTW Beanie is comfortable, breathable, and 95% natural.