The Patagonia Duckbill Running Trucker Hat is built with NetPlus postconsumer recycled nylon faille, made from recycled fishing nets to help reduce ocean plastic pollution, and treated with a durable water repellent finish to shed moisture. The back crown is made of recycled polyester mesh to dissipate heat and increase airflow. The foam brim folds into a pocket for easy packing, then rebounds to the original shape. A dark underbill reduces glare and eyestrain. The adjustable rear buckle has elastic for a snug, personalized fit.