Vogmask Organic VM is certified cotton outer and inner layer with middle layer of VM particle filter for >98% of microscopic particles. The filtering efficiency depends on a good seal around nose and mouth.

From all the test result, N95 is good enough for filtering most of the PM2. 5 particles, but sensitive persons can consider using N99 version of those masks (N99 stands for filtering more the 99% of airborne particles).

The KN95 and N95 face masks both block 95% of PM2. 5 particulate matter of 2.5 micrometers or less in diameter. PM2. 5 particles are a complex combination of pollutants as dust, pollen, smoke, and mist.