The Gnarly Endurance hat is a lightweight, stuffable, performance hat made of wicking woven polyester material. Provides a layer of protection from mother nature that you can use on the trail forward, backwards or stuffed in a pocket. Includes, a soft polyester mesh wicking sweatband on the inside to help move sweat away from your head so you can focus on your run. Fully adjustable back snap buckle provides one size fits all comfort.