I love my Tilley hat! Adjustable chin strap, it floats if it does blow off, has a brim all the way round AND it has a life time warranty so if it wears out you get a new one!
ditto (and talk about goofing looking!)
tilley th4 has the widest brim available of all the tilley's, but it's hell reshaping the brim (it wont look like that for long)