I'm not as convinced.
P2 or N95 masks work to stop particles.
They're a series of waving tubes if you were to look at it from the cross section.
But liquids like respiratory droplets do not behave the same way as solid particles.
The pressure of your breathe breaks them up into smaller droplets and forces them in and out again.
Not dissimilar to how a spray gun works.
Wear one when you are sanding wood -- you'll see, even worn tightly, stuff gets through.
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I'm not as convinced.
P2 or N95 masks work to stop particles.
They're a series of waving tubes if you were to look at it from the cross section.
But liquids like respiratory droplets do not behave the same way as solid particles.
The pressure of your breathe breaks them up into smaller droplets and forces them in and out again.
Not dissimilar to how a spray gun works.
Wear one when you are sanding wood -- you'll see, even worn tightly, stuff gets through.