5 layer activated carbon filter inserts for masks.

The PM2.5 name comes from these filters’ original use as protection against Particulate Matter 2.5, the smallest and most dangerous form of air pollution. Lab tests show a PM2.5 filter with a properly-fitted cloth mask can reduce total airborne particulates by as much as 90%.

12cm x 8cm

When they reach their full capacity, PM2.5 filters lose their effectiveness in trapping air pollutants so they need to be changed regularly. Filters should be replaced after 16-24 hours of total use. One use only, cannot be washed with your fabric masks.