Features of a respirator KN95:

5-layer anti-virus mask respirator against infections, viruses and diseases

Protection Level: KN95 = KF94 = FFP2
Filtration: 95% solids
5 layers filter function:

First layer: spunbond fabric, micron dust filter
Second layer: for filtering industrial pollutants, automobile exhaust, second-hand smoke, pollen, allergies
Third layer: activated carbon fabric, benzene - micron dust filtering function
Fourth layer: dense filter, minimal knit fabric
Fifth layer: spunbond fabric, filters all kinds of harmful substances