4 ms·
They certainly don't help with PM2.5 Also let's not forget some people come from places where the AQ is like that, constantly for a big fraction of the year. Ev
by boomchinolo78 4y ago
They certainly don't help with PM2.5 Also let's not forget some people come from places where the AQ is like that, constantly for a big fraction of the year. Ever been to China or Mexico City?
Edit: Ok, if we're talking about KN95 then that's another story, I'm talking about the usual "face mask" which is little more than a fashion piece.
- flaviut 4y ago> They certainly don't help with PM2.5 The requirement for a mask to be called KN95 is that it must filter out 95% of PM2.5 particles. > AQ is like that, constantly for a big fraction of the year. Ever been to China or Mexico City? Honestly, I'm not sure why those people don't wear a mask year round. I'd expect the rationale to be cultural, "no one else is doing it", rather than logical.
- jerlam 4y agoSouth Korea made their own non-industrial pollution mask standard, KF94, because they get so much pollution from China. Also, many of the older air purifier brands (Coway, Winix) are South Korean.
- deleted 4y ago[deleted]