MOUNTAINTOP Outdoor Fishing Cap Sun Hat Hiking Hats for Fishing, Hiking, Mountaineering, Sports FABRICS-100% soft and breathable Nylon. 9CM ADJUSTABLE-The rear sections of the crown are made of net-like mesh material for extra ventilation. PEAK-The peak is stiffened by paperboard or stiff plastic.Trendy style that works on almost everyone. TREBLE STITCH MOISTURE WICKING- Keep a dry head, summer or winter. VERSATILE- Ultra-light Perfect for Fishing,Beach,Hiking,Runing,Outdoor Activities.