Waterproof, breathable Gore-Tex/Taslan nylon crown and moisture-moving WickLine® lining work together to keep you dry and comfortable Brim can be turned up and secured with VELCRO brand closure tab on one or on both sides Chin strap prevents hat from flying away on windy days Internal cinch-band size adjustment system allows you to customize the fit Factory seam-sealed; earns Gore's "Guaranteed to Keep You Dry" rating