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The real advantage is what’s inside. AirPop's patented 360 adaptive seal and flex frame construction create a fit that’s as comfortable as it is correct. The disposable filter blocks 99.97% PM0.3 including dust, bacteria and viral matter.
snap in: Filter self-registers into the soft shell by attaching with two snaps.
flip out:To adjust fit, simply flip out the top layer of the seal for larger sizes.