Breathing valve: exhale, automatically open the valve, and the gas mask is discharged smoothly. Inhalation, the valve automatically closes to prevent harmful gases from entering the mask. Helps to breathe smoothly, and the glasses do not fog.
Reusable, our engineering anti-pollution masks can be cleaned and reused, just replace the filter.
The package includes: 1 piece * PM2.5 mask and 2 pieces * filter.
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