The Medify Air MA-40 filter has three layers of filtration: pre-filter, H13 True HEPA, and active carbon composite for odors. It removes up to 99.9% of particles down to 0.1 microns while catching pollen, dust mites, mold spores, and other tiny airborne particles. This long-lasting filter has a life of 4 to 5 months or 3,000 hours.  

What is a HEPA filter