If fitted and worn correctly, the N95 mask filters out 95% of particles larger than 0.3 microns, so it’s very efficient at keeping out the 2.5-micron particles in wildfire smoke, according to ...
This 10-pack of N95 respirators (Approval Number: TC-84A-9315) is designed to filter out 95% of non-oil-based particles as small as 0.3 microns, ensuring robust protection in various environments.
“N95 masks provide the greatest risk reduction, but a good cloth mask with a center filtering layer does still reduce risk substantially.” That said, according to Ronaghi, smoke particles are ...