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Original Message
RE: OK - yes I wear a mask when I'm out in public. . .
Posted by Batman on September 10, 2021 at 13:12:23:
Smoke particles range from 0.1 to 1.0 micron, most commonly 0.2 and 0.25 micron.
Don't forget N-95 means it filters 0nly 95% of particles. Five percent may be enough to smell.
Smoke may be able to get through an N95 mask for several reasons.
1. Mask is old, they are designed for single use
2. Mask not fitted properly. In health care, before can use N95 the fit must be confirmed. Interestingly we use saccharine vapor. If one can smell sweet,the mask doesn't fit.
2a. Beard; masks don't seal properly over a beard.Here's a little table of comparative sizes.