3-in-1 filtration system: Pre-filter screen, HEPA filter, and activated carbon filter Timer options (1, 2, 4, and 8 hours) Targets pollen, dust, pet dander, smoke and odors according to company page ...

Filtration level: KN95 masks must filter out at least 95% of particulates, experts told us. For all of the masks I recommend, I obtained associated lab tests regarding filtration.