After having brain surgery and radiotherapy, it's imperative that my scalp is protected from the sun. Most of my hair has grown back, but to be on the safe side, I'll need a hat every day in the summer.
The trouble is, I get hot very easily, and all I can find is baseball caps, which would make me look like a fat trucker, or large straw hats, which are nice, but I'd look a tit sitting on the tube wearing one, with normal clothes.
Any ideas for cool (in both senses) hats or head coverings please?