Coolibar UPF 50+ Women's Sun Hat - Sun Protective Linen/Cotton Blend Elastic closure UPF 50+ - protects against 98% of UVA and UVB rays Approx. circumference: (S/M): 22 1/2 inches (L): 23 inches; Brim: 4 inches Grosgrain sweatband with elastic string for adjustable sizing Travel friendly packable construction Hand Wash; Imported