That's a tough one in SW Florida. I often use a US Military issue Tropical Pith Helmet. Its similar to the British style of the 19th century. Anything in use that long has to have some good points. Livingston, I Presume?
It provides a wide brim and decent air flow on the brain cage. There is no direct fabric touching your head other than the band. They are available a lot on Epay at reasonable prices. I find that if I take it off when working in the shade, I can tolerate it a lot more. Wide brim hats with a neck cover work well too. Its your neck as well as your head that really heats you up.
Want -Ben's Gdn Riverside, CLBC, Cravens Craving, Exquisito, Black Zadar, CdDBN, White Maderia #1, Zaffiro, Campaniere, Raspberry Verte, LSU Tiger, UCR 187-25, Violete Sepor, Thermalito, LA Lightning, Luv, Brooklyn White, Zingarella,Stella,LA-BB, Maltese Beauty