It's 5 layer PM2.5 air mask breathing filters.Replace the filters every week of uses,but need to according to your actual situation.Protect your mouth and face from gases, noxious smells, pollen, smoke, dust and other harmful particles.
For Adult & Children's
Material: Activated carbon cloth
Uses: anti-odor, anti-dust, anti-gas, anti-bacterial, anti-PM2.5
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