I'm one who tends to burn, peel, and be white again. I always wear a hat and shirt, even when it's eleventy thousand degrees out. My current hat is 5 years old and completely falling apart. It's held together with duct tape & superglue. So I think It's time for a new hat to go with my new shoes.
I just ordered the OR Sonora Sombrero from Campmor. It's UPF rating is 50, blocking 100% of UV radiation (for the khaki color). It's also highly breatheable and drys very quickly. I considered the Seattle sombrero, but it sucks up heat, and I'll be using an umbrella anyways if it rains (and if the sun is real bad).