Mexoryl XL. La Roche Posay and Vichy products contain it. Tinosorb M is another photostable UVA filter.
You can find it pretty easily online if you do a search.
In fair-skinned people, 80% of wrinkles are due to UVA sun damage. Not just from tanning, either, although that obviously makes things worse. Incidental exposure is the principal source of UVA exposure: just walking around outside for a few minutes, light through windows, etc. And the sun's UVA output remains pretty constant throughout the day (UVB, by contrast, peaks at midday).
PPD is a measure of UVA blocking strength. The die-hards recommend a PPD of 30+, and re-apply every two hours, day in day out, rain or shine. And a broad-brimmed hat with wrap-around sunglasses, to be worn every time you step outside.
I have the European high-PPD sunscreen and the hat and sunglasses. I'm not quite at the reapply every two hours stage, however.