Here is a link covering how electrostatic filter media works. http://www.kjfiltration.com/monolith-triboelectric-electrostatic-air-filter-media.html http://www

Here is a link covering how electrostatic filter media works. http://www.kjfiltration.com/monolith-triboelectric-electrostatic-air-filter-media.html http://www.kjfiltration.com/monolith-triboelectric-electrost... I think most of the N95 masks use this stuff.