Activated Carbon 5-layer Filter for Face Mask (PM 2.5) - 5 Pack

The perfect add-on to your mask. Comes in a sealed 5-piece pack.

This filter is a PM2.5 (2.5 micron, particulate matter) made of activated carbon and non-woven melt-blown filter cloth, the five-layer filter system effectively keep away from a range of airborne contaminants. 

• First layer of spunbond cloth filters micron-level dust;
• Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens.
• Third layer of activated carbon cloth filters micron-level dust;
• Fourth layer offers filter density for smaller material.
• Fifth layer of spunbond cloth filters out all kinds of harmful substances.

*Replace the filter after one week of use, when any physical damage occurs to the filter, or anytime the filter becomes damp or moist.