EN 149 - Respiratory protective devices
Standard for respiratory masks against particles.
Masks are classified in 3 classes depending on the ability to separate airoborne particles according to the FFP(Filtering Face Pieces).
| Class | Separation ability(at 95 L/min airflow) | Allow leakage between mask and face |
| FFP1 | Filter separates 80% af airborne particles. | < 22% |
| FFP2 | Filter separates 94% af airborne particles. | < 8% |
| FFP3 | Filter separates 99% af airborne particles. | < 2% |
