Particles as small as 0.1um (more than 100 times thinner than a human hair) are filtered by the HEPA filter of the Sensibo Pure. This includes contaminants such as bacteria and viruses, as well as PM (particulate matter) PM1.0, PM2.5 and PM10. Additionally, the active carbon filter absorbs atoms of harmful gases such as smoke and VOCs (Volatile Organic Components).