Disposable N95/FFP1/FFP2/FFP3 Dust Mask With NIOSH Standard For Medical Industrial SafetyN95-by Niosh Standard---USA standardFFP1/FFP2/FFP3 by CE EN149 standard---Europe standardN95/FFP1/FFP2/FFP3 respirator is the most common types of particulate filtering face piece respirators.In United States, NIOSH defines N95 respirator filters at least 95% of airborne particles, not resistant to oil.SpecificationEuropean standard EN 149 defines: Class Filter penetration limit (at 95 L/min air flow) Inward leakageFFP1 Filters at least 80% of airborne particles <22%FFP2 Filters at least 94% of airborne particles <8%FFP3 Filters at least 99% of airborne particles <2%These respirators are entirely or substantially constructed of filtering material.