PM2.5 Activated Carbon Filter Face Mask Breathing Insert Protective Mouth Mask Filter
Feature:

Five layers of PM2.5 air mask filtering
30pcs 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
Filter size:12x8cm / 4.72\'x3.15\' fits all masks, with filter slot
Package Content:

4PCS piece Mask Filters