Five layers of PM2.5 air mask filtering
20/40pcs mask fliters, suggest replace the fliters every week of uses for the best effect
PM 2.5, ideal to protect your mouth and face from Dust, Haze, Germs, Allergies,Smoke,Pollution,Ash, Pollen,Gardening,Crafts
Kids Mask Fliters Size:10.5x7cm/4.13''x2.75''
Adult Mask Fliters Size:12x8cm/4.72''x3.15''