20Pcs PM2 5 Activated Carbon Filter Meltblown Non-Woven Cloth 5 Layers Replaceable Anti Haze Filter Paper -20Pcs-

?20 PACK of 2.5 PM Face Covering Filter ?Five Layer Filtration System with Carbon Activated Layer ?Dimensions:4.8"x3.15" ?Filters fit inside standard reusable cloth coverings ?How To Use: Step1: After washing your hands,take out the product. Step2: place the PM2.5 carbon filter pad in the mouth cover to prevent slipping. Step3: Install thePM2.5 carbon filter,fit your face and wear it correctly. ?Note: 1. When film or sticky sediment stains emerge, please replace the filter. 2. Filter insert can not be cleaned and should be replaced everyday for getting best protection