What it is
This synthetic polyester forms a flexible film on the skin that helps hold UV filters and pigments in an even layer and improves how long a sunscreen stays put and looks uniform on the skin.
Safety & warnings
As a large film-forming polymer it stays on the surface and is generally low-irritation.
Origin & sourcing
Synthetic polyester polymer.
Questions everyone asks
What does polyester-8 do?
It forms a film that helps the sunscreen spread evenly and wear well.
Is it a UV filter?
No, it carries and holds the filters rather than absorbing UV itself.