Kn95 is a Chinese standard mask
From the national standard of China GB 2626-2006 respiratory protective equipment self suction filter type particle respirator
(1) Standard source
This standard is a compulsory national standard of China, proposed by the State Administration of work safety and under the jurisdiction of the National Technical Committee for the standardization of personal protective equipment (SAC / TC 112).
(2) Technical content
From the perspective of scope of application, this standard is applicable to ordinary self-priming filter respiratory protective equipment for protecting all kinds of particulate matters, such as respirators, while other special environments (such as anoxic environment, underwater operation, etc.) are not applicable