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PM2.5 Face Covering Filter Replaceable, 5 Layer Activated Carbon PM2.5 Filter
Advanced Filtration Technology: The filter element of this has 5 layers of protection, bringing you a safe breathing experience.
Suitable for preventing fog, haze, vehicle exhaust, passive smoking, etc.
Face covering replacement filters are disposable and cannot be washed. Recommend replacement of 1~2 times a week.