KN95 masks and N95 masks are actually no very big or obvious difference, in fact, only the mask production and testing standards are different, KN95 and N95 masks protection level is equivalent, but follow the testing standards of different countries. KN95 masks are following the Chinese testing standards, N95 masks are following the U.S. testing standards, both for non-oil particulate matter such as experimental sodium chloride particulate matter The protection efficiency is not less than 95%. In a certain flow rate range, such as 85L per minute standard air flow rate range, the protection efficiency of ≥0.3μm diameter particles can reach more than 95%, this kind of mask for ordinary such as droplets or aerosols have very good protection, because the particle size of droplets and aerosols is much larger than 0.3μm. content source: have come to doctor