Umbrella - hat note: In the blazing sun a hat can be too hot. It will keep your head warmer than it needs to be. The umbrella lets you stay cooler, but a hat is better than nothing in very hot temperatures.
I bring a hat everywhere and I use it everywhere. Not only do I bring a hat, but I bring two hats. Sally, who doesn’t need a hat, used my second hat nearly as often as I used my hat, but she doesn’t need a hat… because she has mine.