KN95 protection masks are suitable for respiratory protection from harmful particles in the air. It can effectively filter non-oily particles in the air, up to more than 95%. It adheres and covers from your nose to the chin to protect against droplets, dust, air pollutants, etc. Some KN95 Masks may be fitted with respirator valve for easier breathing.A reference by 3M in a technical bulletin released in January2020 demonstrates that the several country-specific standards used to grade the FFR tend to converge into functional equivalence.N95 (US), KN95 (China)and FFP2 (EU) standards produce FFR devices that are similar enough to be interchangeable for the purposes of their use in a pandemic.