>They're terrible to wear though. I'm glad I went "full nerd" early and got a PAPR pollution mask.[1] I estimate I'm getting essentially the same 99% protectio

>They're terrible to wear though. I'm glad I went "full nerd" early and got a PAPR pollution mask.[1] I estimate I'm getting essentially the same 99% protection, except without the hot stuffy sensation. The CO2 increase is real, despite propaganda to the contrary. This isn't because a mask "blocks oxygen" (duh), it's just because you're re-inhaling a larger volume of exhaled air, beyond the normal mouth/nose+trachea+unused lung volume.[2] [1] https://www.amazon.com/BROAD-Purifiers-Rechargeable-Respirator-Protection/dp/B0B1ZZGKSD/ https://www.amazon.com/BROAD-Purifiers-Rechargeable-Respirat... [2] https://en.wikipedia.org/wiki/Dead_space_(physiology) https://en.wikipedia.org/wiki/Dead_space_(physiology)