Bought this hat to take on a fishing trip. It was exactly what I needed. I don't like hats that make my head hot but I get sunburned easily and need protection. This hat does both well - top is ventilated about as well as a hat can be but it's big enough to protect my face and head from the sun. And the mudflap in the back if you need it to keep the sun off your neck. Great hat.
I have a large head, like 24" dia. After reading the reviews I could not decide between the 2XL and the 3XL. The fishing trip was coming up fast so I ordered both just to be sure. The 2XL was a little too snug but the 3XL was perfect. Returned the 2X with no trouble at all.