PM 2.5 Activated Carbon Filter Insert, Replaceable Anti Haze Filter Paper (50 Pack)

Filtration technology: made of activated carbon and non-woven face cover filter cloth, five-layer filter system effectively keep away from PM 2.5 and a range of airborne contaminants. Five-layer Filtration: Multiple protection to isolate dust, multi-layer folding, good ventilation. Wide applications: Activated Carbon Filter anti airborne particles pollution, dust, smoke, and so on. Warm Tips: PM2.5 Replacement Filters, disposable supplies cannot be washed. Recommend replacement of 1~2 times a day.