The Patagonia Merganzer Hat is crafted from breathable 96% NetPlus postconsumer recycled nylon made from recycled fishing nets and 4% spandex plain weave, finished with a durable water repellent treatment to shed light moisture. A soft, floatable brim with a dark underbill helps reduce glare and shields the eyes from the sun. The integrated brim rope doubles as a chin strap to secure the hat during duck dives while maintaining a clean look on land. A low-profile, adjustable quick-release buckle at the back ensures a snug fit, and a discreet leash anchor helps keep the cap secure even when submerged. Inside, a lightweight, low-profile sweatband with miDori bioSoft delivers moisture control and softness for all-day comfort.