For added protection, our fabric masks are built with a filter pocket. The PM 2.5 Activated Carbon filters are an excellent choice. If used properly, the PM 2.5 filters will filter out very fine air and gaseous pollutants. The PM 2.5 stands to block particles matters less than 2.5 micrometers in diameter.
You are buying a 10 filter pack.
Although it is very effective for personal use, this item is not intended for medical use.