N95 is the certification level of American respirators, certified by the National Institute of Occupational Safety and Health (NIOSH). This type of mask can filter out more than 95% of non-oily particulate matter (aerosol) under the specified air flow (85L / min), so it is named N95. And if it can filter more than 99% of particulate matter (aerosol), it is called N99 mask. In addition, corresponding to N95, KN95 is a mask approved by the standard of GB2626-2006 Respiratory Protection Self-Suction Filtering Anti-Particle Respirator.
