The lower neck and the whole chest should be required to be covered when out in the sun by law, in order to prevent damage to what I believe is the most delicate part of the entire body.
I love seeing cleavage though so we'd need to invent shirts with a perfect cut so chicks could still show off the very top area of the titties themselves while still covering the rest of the area.
A titty window, if you will...

The titty window should be fitted with a super fine mesh that matches the color of the shirt though...
In order to protect at least a little...
It's the direct contact of the light on the skin that starts the reaction that leads to burning/damage.
We could still see the cleavage well enough.
Or you can always go back to wearing those big hats and using parasols.
women should NEVER have removed head coverings
that is why western society is DOOMED , you skanks
grab some prudence !
the arrogance and spitefulness towards GOD ALMIGHTY by the whoresome ladies has encouraged DEGENERATE men, mostly democrats and liberals, to thrust their gross perversions upon ALL OF US (exhibit A joebiden)
I watched an old sci fi movie with titty window costumes the other day.

Leontine Snell and Leonora Ruffo both sport titty windows in this Italian sci fi epic:
https://www.imdb.com/title/tt0058859/
Snell's character Luisa is a dipshit, but she's hot AF, and so are her costumes.
Why is the professor's daughter always prancing around in a skimpy costume when virile men come a-calling in sci fi flicks anyway?

Fresh Spunk smeared all over the upper chest and titties acts as a good sunscreen.
I do believe sperm has magical qualities which benefit women and I rub it on these areas whenever I have the chance.
This advice given to you from a woman that is part of the massive NSA network of women that are basically contracted 'honeypots' . They are used against the American people to attract individuals(usually white males but an occasional Ling) who may be thinking up nefarious plots against the government . Basically they are trained to engage these subversives in way possible but it mostly degenerates into lurid sexual scenarios . Once they get their Delilah claws sunk into your brain your defenses are lowered and it becomes easy to probe your motives and plans . This is why it is so important to keep a pure body and mind and refrain from pleasuring yourself everyday ...it just makes you stupid and vulnerable to these wicked traitorous women - many of which are recruited from the Deep South .