Do any of you wear N90 masks when the AQI is high? I have one and should, but it feels both awkward and somehow rude to do it when most people are going about their business with no sign of respiratory distress
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This one is a bit ghetto but is cheap and works fine. You need to look at the raw counts though, their AQI formula is wrong. Just do PM2.5*3=AQI https://www.amazon.com/dp/B07DL1M46J
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