FFP2 Masks, Dark Gray FFP2 Mask,50 Units 4 Layers FFP2 Masks CE Certified Disposable Mask. Made of 4 layers of non-woven fabric, melt-blown, resistant moisture-proof, non-toxic, non-irritating Elastics & Adaptable nose clip| High quality elastic earpads make it comfortable to wear for a long time. | Breathable non-woven fabric preventing dust, pollen, etc. Box of 50 Disposable Masks - 5 Pouches of 10 Masks Our FFP2 masks meet the EN149 standard which requires an efficiency of bacterial filtration (EFB): >=99% of bacteria 3m and larger & a particulate filtration efficiency (PFE) >= 95% is used to filter 94% of airborne particles. The total leak rate must be less than or equal to 11%. They are used to filter 94% of airborne particles. The total leakage rate should be less than or equal to 11% With our korean fish model ffp2 masks, you can protect yourself well from fine particles when you are outside, for example, at school, at the shops, library, hospital etc.