PM 2.5 Activated Carbon Replacement Filters


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PM 2.5 Activated Carbon Replaceable Filters for your fabric masks.

PM2.5 refers to particulate matter (PM) pollutants that have a diameter of less than 2.5 μm, which is about 3% the diameter of a human hair. Fine particles can come from various sources, including respiratory droplets. Humans can produce respiratory aerosols (droplets) by several means, including breathing, talking, coughing , sneezing  and even singing. Droplets >5 μm tend to remain trapped in the upper respiratory tract (oropharynx — nose and throat areas), whereas droplets ≤5 μm have the potential to be inhaled into the lower respiratory tract (the bronchi and alveoli in the lungs). (Source: For more information please check this assessment article published in the Journal of Thoracic Decease (

CDC recommends wearing cloth face coverings to help the spread of COVID-19 (

The PM2.5 5 layers replaceable filters dramatically enhance the regular cloth mask ability to stop most respiratory aerosols.

Please Note: Filter insert can not be cleaned and should be replaced every 1-2 weeks. 2.  When film or sticky sediment stains emerge, please replace the filter!

Additional information

Weight 0.5 oz
Dimensions 11 × 8 × 0.25 in

Single Filter, 2 pack, 4 pack, 6 pack, 12 pack


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