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4/5 layers of PM2.5 air mask filtering, the mask filters can be replaced by yourself.（It is recommended to replace it once a day）
Ideal to protect your mouth and face from Dust, Haze, Harmful particles, Allergies,Smoke,Pollution,Ash, Pollen,Gardening,Crafts
Have Four/fIve-dimensional sewing, you will form inserting the filter into
The filter has good air permeability, and actively delivers fresh air at all times, completely free of belching, environmental protection and no odor
This cotton sheet filter is used with outdoor mask. Package:5/10 PCS Filter
SANGQU Replaceable PM2.5 Dust-Proof Cotton Sheets Mouth Filter Anti-Fog and Haze Pollution Protect Your Respiratory Tract Gray 10pcs B086SBC2T3