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KN95 respirator face masks work by using a 4 layer filtration system to filter out 95% of airborne particles such as harmful pollutants, dust, smoke, fiberglass, wood, and other allergens allowing you to breathe easier, and protect your lungs. Each KN95 respirator is disposable, and by wearing a new K N95 respirator each time you are going to come into contact with airborne allergens or pollutants helps ensure maximum filtration to protect your respiratory system. To ensure proper use the mask should fit snugly to the contour of your face. You can adjust the fit of the mask using the adjustable nose bridge, and secure the mask comfortably behind your ears with the soft elastic ear loops designed to eliminate pressure to the outer ear. Disposable K N95 respirator masks should fit most adults and children, and can be used year round when visiting public areas such as grocery stores, pharmacies, parks, and post offices.
Note: These masks are not NIOSH certified. U.S. health care providers should consult the FDA guidance at this link prior to use.China FFP2 Face Mask manufacturers
website:http://www.jufacemask.com/ffp2-face-mas/