1. KN95 level protection,filtering efficiency up to 95%, PM 2.5 pollution ash.2. The production of our masks strictly follows GB2626-2006 (China's KN95 standard). The technical requirements and test methodsof GB2626-2006 (China's KN95 standard) are basically consistent with 42 CFR 84 (US standard).3. Activated carbon layer inside can effectively absorb organic smell and odor.4. High-quality elastic ear-loop with no pressures on the ears,makes it comfortable to wear for a long time.5. Close fit to prevent polluted air from entering.6. Nose sponge cushion, soft and flexible nose cushion makes mask wearer feel more comfort.7.Adjustable soft nose clip, fit the bridge of the nose, prevents fogging of glasses block the haze from entering.8.Wide applications: can be used for electronic manufacturing, dust-free workshops, catering services, food processing, schools,motorcycles, beauty, environmental cleaning, public occasions and many other uses. All the filter efficiency indicators are above95%.