It is very hard to find this kind of hat in the shops. We used to get them from a stall at an agricultural show which no longer exists. Totally waterproof keeps rain out of your eyes and you can carry it around everywhere just in case.
This looks like a nice waterproof hat. However I measured my head several times and I am sure these come up a bit snug. If I was going to buy a similar one again I think I will get a size larger than I think I need. Wish they did it in black to match my coat.