The North RU8500 is currently NIOSH approved as an airpurifying respirator and also as a continuous flow supplied air respirator (CF-SAR).
When used with the appropriate filters, cartridges or filter/cartridge combinations, the North RU8500 is an air-purifying respirator for protection from particulates, gases or vapors, or any combination of particulates, gases and vapors.
For this specific Covid-19 situation we offer the mask with a P100 cartridge filter, with the following ratings:
P = Oil Proof
100 = Removes 99.97% of all particles that are 0.3 microns in diameter or larger. HE or HEPA quality filter.