Features:  Dual One-way Discharge Valves：Make air resistance smaller without sacrificing filtration. Adjustable Nose Bridge：The M-shaped clip is adjusted to fit each person's nose to make the mask more snug to the nose. Chin Closely Fit: Air can only pass through the filter, not through the gap. Elastic, Adjustable Earloop:One size fit most people, suitable for adult,men and women. Reusable: Cotton mask parts can be reused after cleaning Can be used in multiple occasions: apply to haze ,dust,pollen allergy, vehicle exhaust,outdoor activities, cold weather ,smoggy weather and other protection A pack of 2, Complimentary 4 activated carbon filters. Specifications:  Type: Anti-dust face mask. Material: cotton, activated carbon. Size of Cotton Mask: length 9.1"  ,width 5.1". Size of Filter: length 4.7"  ,width 3.1". Gross Weight: 2.29 oz. Out packing size: 6.3 inch * 8.7 inch * 0.55 inch. Please allow 1-2 in differs due to manual measurement, thanks. Direction for Use:  Cotton masks can be used repeatedly after cleaning. The filter cannot be cleaned.
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