100% recycled polyester ribstop, lining: 100% recycled polyester mesh. 5 panels, recycled polyester, water proof, mesh inside, closure with metal buckle. Outdoor 4-season hat in recycled polyester ripstop. Heat sealed tapes for maximum waterproofing. Inside mesh lining and dry-tech sweatband in recycled polyester. Unstructured 5 panels and curved visor. Metal Sunday buckle closure.