10 Pcs PM2.5 Activated Carbon Filter for Breathing Insert Protective mask Anti Pollution Washable Cotton for adult Outdoor Activities

1.Product: PCS PM2.5 Activated Carbon Filter Replaceable Anti Haze Filter. Filters size: 12.5 x 8 cm/ 4.9 x 3.1 inches. 2.First layer of spunbond cloth filters micron-level dust; Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens. 3.Third layer of activated carbon cloth filters micron-level dust; Fourth layer offers filter density for smaller material. 4.Fifth layer of spunbond cloth filters out all kinds of harmful substances. 5.Note: 1. Filter insert can not be cleaned and should be replaced every 1-2 weeks. 2. When film or sticky sediment stains emerge, plea

20 Pcs PM2.5 Activated Carbon Filter for Breathing Insert Protective mask Anti Pollution Washable Cotton for adult Outdoor Activities