Air pollutants (including PM10, PM2.5)Our FilterTech Liners and Ultra Mask' filter 99.9% of BFE, PM10 and PM2.5 particles as well as 90% of particles with a mass median diameter of 0.1 micrometers. Therefore, you can expect protection from PM10, PM2.5, and even smaller particles.PollenOur FilterTech Liners have an efficiency of above 96% at 0,3 μm particle size, whereas normal pollen particles are about 10 - 1000 μm in size.Bacteria and VirusesThe anti-microbial finish and FilterTech Liners offer the best possible filtration against biological substances, including bacteria and viruses. It is important to understand, though, that wearing a mask cannot completely eliminate the risk of infection, as per the CDC guidelines. Our mask is not designed or certified for clinical environments, such as hospitals or dentist offices.SmogThe active carbon layer in our filter can help reduce the particles and chemicals in smog.Automobile exhaust and smokeThe active carbon layer can help reduce automobile exhaust in your surrounding air.Odor and fragranceThe active carbon layer can help reduce odors and fragrances in your surrounding air.Animal AllergensNormal animal allergen particles are about 5 - 10 μm in size and are therefore too large to fit through our FilterTech Liner, so you will be protected.