Pack of 5 replaceable activated carbon PM2.5 breathing filters.
These five-layer filters feature 2 layers of filter fabric, 2 layers of non-woven fabric and 1 layer of activated carbon fabric. PM2.5 filters are made from the same advanced materials used for respirators like the N95 and KN95. Lab tests show a properly fitted PM2.5 filtered mask can reduce airborne particulates by as much as 90%.
We recommend that you change the filter at least once a week if using daily.