I've never worn much headwear, but I think I might need some kind of summer hat for our vacation. It's probably going to be really hot and we are likely to be outside the whole day more often than not. I'm not quite sure what to look for. Is there such a thing as a stylish, packable sun hat that works with a short pixie cut and glasses? Or should I just don't care and buy one of these squashable cotton bucket hats? What kind of headwear do you wear in summer?

Any kind of suggestion and pictures welcome.