Borje KN95 Face Masks 50 Pcs, Individually Wrapped, 5-Ply Protection Black KN95 Mask, Disposable Face Masks for Adults Details: Filter Class KN95 Pack of 50 Black Against PM 2.5 from wildfire smoke: Borje KN95 face masks comply with GB2626-2019 for at least 95% filtration efficiency against certain non-oil based particles During an air quality alert, KN95 masks are a good option to reduce your exposure to pollutants. 5 layers protection: Made of two layers of non-woven, two layers of melt-blown, one layer of hot air cotton 3D shape is designed according to human face shap Ensuring the tightness, It increases the breathing volume at the same time KN95 face masks made in China (not in US) Disclaimer: This KN95 mask is NOT an N95 mask New in Box