POLYESTER-17 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYESTER-17

Safety grade: A

Polyester-17 is a synthetic polymer that forms a flexible, invisible coating on skin or hair. It helps products feel smooth and lightweight while providing a protective layer.

This ingredient creates a breathable film on the skin, improves product texture and spreadability, and helps control how thick or thin a formula feels.

Graded using: COSING.

Last verified: May 26, 2026