3 microns or larger, such as dust and allergens.A backing charcoal filter removes odors. Three Replacement Filters For The Electronic HEPA Filtered Face Mask Replacement HEPA 13 filter traps up to 99..

A backing charcoal filter removes odors. Three Replacement Filters For The Electronic HEPA Filtered Face Mask Replacement HEPA 13 filter traps up to 99.

Each filter lasts for up to 30 days. Three Replacement Filters For The Electronic HEPA Filtered Face Mask Replacement HEPA 13 filter traps up to 99..3 microns or larger, such as dust and allergens.