A UPF of 50+ indicates that this fabric was tested and will block up to 98% of the Sun’s UVA & UVB rays.
For More Details Visit: https://www.sunnsand.net/upf-protection/
LOVE this hat! Saw it at our hotel store in Aruba and wanted to buy-but already had a hat and didn't want to crush on the flight home. Went on the website and was thrilled to find this and another. Purchased both and am now set for the summer. It looks so expensive and was such a deal! Thanks!