I have a question about the fit test. Despite having a beard, I went ahead and bought a half-piece respirator (the 3M 6501QL), as I wanted some protection from sawdust and such (and I figured I didn’t mind shaving my beard off if necessary). When I wear it and perform the simple at-home fit test described above and elsewhere (cover the filter holes), I’m totally unable to breathe and the respirator buckles in slightly, which matches the success criteria. Does this mean I do have an airtight seal, despite my beard being in the way? I’m surprised as the facial hair in the relevant areas definitely seems longer than stubble, though I guess it is on the shorter (and lighter) side, and I tend to trim a bit closer along the mask lines so as to achieve a tighter seal with my usual daily-use masks.