KN95 Mask: 12 Things You Need to Know Before Buying ...
Dec 24, 2020·KN95 respiratory masks – masks that are regulated by the Chinese government under regulations GB2626-2006, GB262-2019, and GB19083-2010. KN95 masks provide 95% protection against all particles that are greater than 0.3 µm in diameter (bacteria, viruses, pollution particles, fine particles, dust, smog, pollen, etc.)