Frequently Asked Questions About Best Face Mask Filters
bestfacemaskfilter.comInsert air filter media between the layers of your mask & trap 98% of airborne particles. Best Protection Filter captures 98% of airborne pollutants as small as 0.3 microns. Superior Protection Filter ideal for making ASTM Level 1, 2, and 3 medical grade face masks. Bacterial Filtration Efficiency (BFE) 95% per ASTM
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