As someone who's always hot (and as someone concerned about micro-plastics), the widespread use of polyester in clothes is something I loathe. If I'm lucky, I'll find 100% cotton in my price range. Still looking for some quality linen, I hear that's the best for hot days. Would love to try it someday, if I can ever find it.

I don't shop for clothes online - it's nearly impossible to ensure sizing is accurate, and the place I live isn't a good location to have boxes sitting outside all day.