Also useful for filtering out the smoke from forest fires although it gets tedious to wear one all day for days in a row, so in addition to a mask it is nice to own an air purifier with a HEPA rating or a MERV rating for when you are indoors.
Also useful for filtering out the smoke from forest fires although it gets tedious to wear one all day for days in a row, so in addition to a mask it is nice to own an air purifier with a HEPA rating or a MERV rating for when you are indoors.