This special 5-layer activated carbon filter effectively filters PM2.5 dust, haze, smoke, pollution, ash, pollen and other fine particles.
These PM2.5 filters consist of 2 layers of non-woven fabric, 2 layers of melt-blown cloth and 1 layer of activated carbon cloth for optimal protection.
This is the same material as used for respirators such as N95 masks plus activated carbon fabric providing a more environmentally friendly alternative.
The total number of filters in this pack are 4 pieces (2 packs of 2 filters each).
Please note that this filter cannot be washed. It is recommended to replace filters regularly (about every week of occasional use or after 16-24h constant use).