Feel secure with the PM2.5 face mask filter. The PM2.5 filter offers 99% filtration using 5 layers of protection including activated carbon middle layer and 2 filtering layers in front and behind.
Disposable PM2.5 filters offer protection that is practical. Filters are flat, so they take up less space. They do not lose effectiveness, and you can use them continuously for up to 40 hours when used in light pollutant environments.