Each mask comes with a multi-layer PM2.5 Filter featuring 2 layers of Meltblown Filter and 1 layer of Carbon Activated Fabric. Filters should be replaced every 7 days.
Particulate matter (PM) refers to particles in the air that cause pollution.
Particulate pollutants vary in size and the smaller they are, the more damage they cause to your health. A PM2.5 mask refers to a mask that is able to filter out particulates that have a diameter of 2.5 micrometers (microns) or less.
Coronavirus particles are spheres with diameters of approximately 0.125 microns. The smallest particles are 0.06 microns, and the largest are 0.14 microns.