> The masks I was wearing filter to about 0.3 micron I might vaguely recall some masks claiming such filtration and failing miserably in my testing. I would l

> The masks I was wearing filter to about 0.3 micron I might vaguely recall some masks claiming such filtration and failing miserably in my testing. I would love to find such a mask that actually works. Can you please post a brand and model, or a link? It's easy for anyone here to test them with the setup I described above.