PM2.5 refers to atmospheric particulate matter (PM) that have a diameter of less than 2.5 micrometers, which is about 3% the diameter of human hair. Particles in this category are so small that they can only be seen with a microscope.
These filters will screen those microscopic particulates to keep you safe. Fits all of our face masks with filter slots.
Dimensions: 8 x 12 cm
Pack of 10.