Add a piece of PM2.5 Activated Carbon Filter to your mask.
Constructed from 2 non-woven fabrics as outer layers, 2 melt-blown cotton filters with an active carbon filter inserted in between.
This 5-layer filter system is used to keep away from PM2.5.
PM 2.5 refers to a particle width filter of 2.5 micron (human hair in relation is 40-50 micron), ideal to protect your mouth and face from dust, haze, pollution, ash, pollen, heavy metal particles and other harmful pollutants.)
