Face Cover Filter PM2.5 Activated Carbon Replaceable Dustproof Filter Protective Equipment

Features:
Made of activated carbon and non-woven melt-blown filter cloth, has 5 layers totally.
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.
Five-layer filter system effectively keeps away from a range of airborne contaminants, dust, haze, allergies, pollution, pollen, hazardous chemicals, heavy metal particles, etc.