I've been looking at the "Flats" hats also. I am looking for a light hat with a dark color on the underside of the bill, removable cape to cover the neck and ears and good ventilation. There are a lot of different types to choose from. They are also called "guide" hats.
Anyone have a brand preference?
Never knew there was much in a hat until I started searching around. Here's some I liked so far.
http://www.buckscountyoutfitters.com...2C-Khaki%2C-M/
http://www.flyrodshop.com/detail.php?pID=420&rp=1
Let me know if you find anything good.
Brian