Filter Inserts for Face Masks.
Material: The material is comprised of non-woven fabric, activated carbon and advanced filter cotton.
Five-Layer Filtration: Multiple protection to isolate dust, multi-folding, good ventilation, double your protection with an additional filter.
Size: Activated carbon. Replaceable Anti Haze Filter. Filter size: 12x8 cm.
Filtration Technology: Made of activated carbon and non-woven melt-blown filter cloth, five-layer filtration system effectively keep away from a range of airborne contaminants.
Wide Application: Activated Carbon Filter helps protect against airborne particles dust, smoke, pollution, ash, gardening pollen, suitable for most occasions
When to Replace: If you use the mask often, recommend replacing every 2-3 weeks, if not every 3-4 weeks.