VBIGER Bucket Hat Sun Hat Foldable Wide Brim Hats UPF 50+ 100% cotton fabric, breathable and cool in summer. Free size. Head circumference: about 22.8''. UPF 50+: this sun hat has passed UPF 50+ test, it could block 97.5% or more of sun UV rays. Adjustable drawstring for fixing the hat, especially in windy days. Foldable and packable, easy to carry, suitable for traveling, beach, and other outdoor activities.