N99 Replacement Filters (4 Pack) for Healthy Air Mask PM2.5 face masks only;

N99 Replacement Filters ONLY for Healthy Air Mask PM2.5 masks, NOT FOR Vogmask. The N99 Particulate Filters are NIOSH approved for protection against solid and liquid particles - not including those that contain oil. N99 replacement filters are NIOSH certified to have filter efficiency level of 95% or greater against non-oil based particulates. The N99 replacement filter can ONLY be used with any Healthy Air Mask PM2.5 face masks. Includes 4 N99 filters per/package. NO REFUNDS OR RETURNS.