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 a human hair.

Commonly written as PM2.5, particles in this category are so small that they can only be detected with an electron microscope.

The following image can help you visualize just how tiny less than 2.5 micrometers actually is.

PM2.5 Visualized

PM2.5 Visualized

A PM2.5 filter is designed to filter out PM2.5 sized materials and larger.

We offer 5 layer, melt-blown, activated carbon PM2.5 filters that provide anti-bacterial, anti-dust, and anti-pollution protection for you.