The fit of your face mask has a lot to do with how effective it is — the tighter the better for filtering your breath and keeping others safe from viral particles, including those of COVID-19. That ...
Mask up! How to choose and maintain the best masks for use against COVID-19 | Page 5 | Ars OpenForum
What I'd like to see is a filter bag to put on the vents of vented masks. I have a 3M cartridge mask that I literally wore inside my own home for 2 or 3 weeks during the peak of allergy season (worth ...
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