Eric Javits "Hampton" sun hat in signature Squishee® material looks good no matter what you put it through. Man-made fibers are woven to resemble straw but are more lightweight, flexible, and durable. Elasticized inner band fits most. Lightweight and packable. Floppy brim, 4.5" span. UPF 50+: blocks 95% of UVA/UVB rays. Pinched crown. Polypropylene/polyester. Hand-finished in USA of imported material. Independent testing in accordance with AATCC (American Association of Textile Chemists and Colorists) has determined this hat's effectiveness for blocking ultraviolet radiation as well as UVA/UVB radiation and awarded the highest possible rating, UPF 50+.