Why would the virus particles make it through to the outside, it’s not like its a one way valve that only allows going through the filter on the way in. I would say that in reality the mask still filters but however the amount of virus particles in the air surrounding someone who is infected would be Significantly greater than those found in the air where someone who was infected may have been recently. Making the odds of virus particles making it out into the world a much greater probability of success over time than a few getting through your filter and infecting you with an N95 on. Or am I not understanding something about n95 structure that only filters primarily from one direction? Oh wait, is that little structure the check valve on the mask? and so all masks have this checkvalve and I was just too silly to realize it? doh
What about Mira vs Mestel? I bought mira but now I”m wondering about this mestel. of course no comparison so not sure.