Outdoor Research Aquifer Sombrero Nylon,Polyester Imported Fabric Performance: Water-Resistant, Breathable, Lightweight, Wicking, Quick-Drying, TransAction Headband, UPF 50+ Design Features: Dark Fabric Under Brim, Floating Foam-Stifened Brim, Varied Brim Width, Embroidered OR Logo Functional Details: One-Handed Drawcord Adjustment, Removable Chin Cord, Packable Solar Shield Construction Foam Stiffened Brim Floats External Draw cord Adjustment