ADDED: Activated Carbon layer for better absorbption of odors, pollen, toxins, PM2.5 and SPM pollution
Much-needed Exhalation Valve allows exhaled air to flow out freely - keeps you well oxygenated
Material: Folding、Nonwovens、melt-blown, inside the white outside the dark gray
note:Under the condition of using time is 6 to 7 hours a day ，Still can use about 1 week.
Carbon Valved Particulate Respirators, box of 10

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Item Weight: 0 ounce (View shipping rates and policies)

ASIN : B01A4G2BCY