Though I discovered that Outback hat makes walking in the Seattle rain quite pleasant!
Oh, and nobody cares what you wear on your head.
Wear hats. Hats are cool.
Also carrying Sun Umbrellas is totally fine as well!
This has been the source of some comic misunderstandings, whereby an American bloke says they are/like wearing suspenders, and the listener then assumes they are coming out as transvestite.
I'm not so sure most people in Oslo would have agreed it was "acceptable" but he didn't care, and it's not like anyone would call him out on it.
I'm in my late 40's now, and kinda want to wear a hat but I think I'll pick something which stands out less.
You can see various expressions, some which say “and a good day to YOU young man” from some of the older guys to a “hmmph good day” from some of the well dressed women.
https://www.boredpanda.com/blog/wp-content/uploads/2017/12/s...
...with one expressing a coy "oh, hi" and the other with the frumpy look-of-disapproval.