I live in a country where it's always hot most of the year (except when it's raining). It's a 15-minute walk under the scorching sun from my house to my workplace and it's something I've gotten used to already (albeit with a lot of complaining). I am aware of all the UV rays that I'm
I thought that clothes already block UV rays by being optically opaque!
A cotton t-shirt has a SPF of about 6. It will help, but we can do better, even without melanin-infused clothing.
There are also UV transparent bikinis, for tanning without tan lines or nudity.
Maybe a little. Hold a shirt up to your face and you’ll still see light.