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.
Five anti-counterfeiting independence

Technical Details

Width : 0.75 cm
Height : 0.75 cm

Product Details

ASIN : B014CHCKG8