- 2.5-layer H2No® nylon - Mesh lined for wicking moisture, comfort - Snaps on sides of crown for versatility, widened visibility - Adjustable chin drawcord for secure fit - Adjustable rear buckle with elastic for snug fit - Shell and underbrim: 2.5-layer, 2.5-oz 100% nylon with waterproof/breathable H2No® barrier and DWR (durable water repellent) finish. - Inside crown: 2.9-oz 100% polyester mesh with DWR finish 99 g (3.5 oz)