PM 2.5 filters block particulate matter of 2.5 micrometers. Can be used for up to 7 days before needing to replace the filter.
*These are fashion masks intended for personal use, not approved for healthcare. Masks are not eligible for returns or exchanges, mask sales are FINAL.
*These filters are not meant for medical use. PM 2.5 filters should be used for personal face coverings only.