30 PCS Adult PM2 5 Activated Carbon Filter Insert 5 Layers Replaceable Anti Haze Filter Paper

30PCS Adult PM 2.5 Activated Carbon Filter Insert 5 Layers Replaceable Anti Haze Filter Paper 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.