How Does Your N 95 Mask Stop Viral Particles?

There's an exit valve down at the bottom, or exhalation valve, eh? So that's where all your air exhales. For filtrationer goes from heppa to ulpa ulpas, like the higher end. We have ulpa 16 paper, so it is harder to breathe through it. However, this will stop viral particles. Your n 95 mask, or your face mask, will not stopped viral particles. And this is something we tested at an independent laboratory.