To keep it simple, after wearing it, I bought one for my father. It has great sun protection and is light weight. Perfect for hot days. Myonly comment is that because it is white you need to clean it often. THe 1 star deduction is for the white version which needs more cleaning... not a fault of the hat at all.
UPDATE: While I have really grown to like this hat, the white color eventually stains (I guess from sweat) and is not usable. I am disappointed.