Interesting bit on WHY we're wearing masks. Apparently, controlling exhaled contagions is easier then inhaled ones.
IRT the n95 substitutes, I'm using pm 2.5 pollution masks with replaceable filters. My reasoning, which may be faulty, is the masks are designed to filter out 2.5 micron particles, so they should be effective against the larger 5-10 micron droplets transmitting COVID 19. Also, they're more comfortable than the fold flat filters I stocked in the emergency kit.
https://www.theatlantic.com/health/archi...PT659hn2Nbw0dcU