FFP2/FFP3 masks: Executive standard – EN149:2001+A1:2009 (Europe) FFP2 masks are similar to N95 respirators and KN95 masks and are commonly used in Europe as respiratory protective devices. FFP3 masks have a higher filtration efficiency compared to FFP2 masks, filtering out at least 99% of airborne particles, and are used in environments with high levels of airborne contaminants.