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New estimate applies to orders after May 21, 2020.
Particulate Matter 2.5 Filters are able to protect you against droplets in the air that are about thirty times smaller than than the width of a human hair. They easily slip into our cloth face mask pockets.
Here’s some more info about PM 2.5 filters:
Constructed from high quality non-woven melt-blown cloth, spun bond fabric, and activated carbon. These are the same advanced materials used for respirators like the N95 and KN95
Airborne viruses like the Coronavirus are even smaller than PM2.5 (the Coronavirus's lipid envelope is about 120 nanometers across). However, research has shown the material to capture nanoparticles of a similar size with a high degree of efficiency (approx. 95%), and lab tests show a PM2.5 filter with a properly-fitted cloth mask can reduce airborne particulates by as much as 90%.
Disposable PM2.5 filters are flat, so they take up less space than standard respirators. They never lose effectiveness, and you can use them continuously for 16-24 hours or whenever it becomes harder to draw a breath.
Remember, no mask is 100% effective at protecting from viral transmission. The most effective thing you can do to stay healthy is wash your hands and practice appropriate social distancing.