`-50PCS- PM 2.5 Activated Carbon Filters Hepa FilterFilters Insert Replacements5 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. Filters Specification: Material : Non-woven Cloth,Melt-blown cloth. Dimension:4.72" x 3.15". 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. After-sales Service:We guarantee the quality of the products. If you have any questions, you can contact us through Amazon, and we will solve it for you immediately.