When HN users recommended it
1 HN user recommended this in 2023, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2023, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
>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-Respirat...
[2] https://en.wikipedia.org/wiki/Dead_space_(physiology)