Sunday Afternoons Sundancer Hat, White, One Size 100% Nylon Imported 4 1/2 wide brim with floatable foam core and poly brim wire for full-face coverage.7 1/2 pleated waterfall veil protects neck and upper back. UPF 50+ certified sun rating,Water repellent / stain resistant Ponytail friendly opening at back of crown.Interior wicking sweatband.Packs for travel Chinstrap with cord lock.External sizing band for custom fit.Lightweight: 3 ounces Size: Womens M - One size fits most (see hat sizing chart) Patent #D594,185. Designed in USA