Sun Protective Clothing by Solumbra 100+ SPF Sun Protection Hats, Shirts, Pants and Accessories

Not cheap but I bought my hat over ten years ago (the one with the hat band) wash it in cool soapy water by hand, wear it in the pool, it's still fine. Mine is a little big tho, I sized it too generously. I can't usually wear women's hats, even when i was a kid. All those math brains have to fit somewhere!

Also makingitbig website has some cute black or white or black and white hats, but idk about the size.