The AirLief masks have been designed to filter dust, pollen, bacterias, and viruses up to a size of 0.1 microns (up to fine particles as PM2.5 and PM0.3).We have tested and certified our masks in a lab in Poland (the EU).
The masks have a European FFP2 certificate. This certificate shows the effectiveness of the whole respirator, not just the filter. The European FFP2 standard is not exactly equal but very similar to the American N95 standard.
The AirLief masks can filter more than 96% of the particles with a diameter of fewer than 0.1 microns (hundreds of times thinner than a human hair). Currently, our team is working on a mask that can filter more than 99% and can be certified for FFP3.
The masks are tested for viruses with a diameter of 0.1 to 0.5 microns and have 96% efficiency. Note: some of the viruses are below 0.1 microns, but the standards are very hard to say to what extend each virus is filtered, it depends on the virus. However, for people that are not ill, and use masks for protection from diseases the FFP standard is the most applicable as the mask is tested also on how well it fits the face (the so-called fit testing). On the other hand, medical masks are designed for the ill person (surgeon) to wear it, so it will not spread illnesses.
The mask can also filter some smokes, thanks to the activated carbon in the filters. Note: Cigarette smoke and diesel exhaust are too aggressive not to feel them, but it reduces the smell.