For what it's worth
- Jan 30, 2016
Someone please send this article to this man. I don't have twitter. Ok, thanks!good luck
mouth breather breath melts masks
and then it releases the hot soupy covid even worse than if they weren't wearing it
Short of N95s or better it is a false sense of security
What is PM0.3 and why is it important? You'll find a lot of fuss about 0.3 microns. HEPA and masks filters are great at capturing them.
It's about hepa filters but at the bottom says that masks work in the same way.