【Filter Efficiency ≥ 95%】LEVENIS Ventilation Series KN95 Face Masks follow the GB2626-2019 respiratory protection standards, made of 2 non-woven outer layers, 2 melt-blown inner filterr, offers more protection than a standard disposable 3-Ply mask. The filter efficiency ≥ 95%. 【Skin-friendly and Comfortable】These KN95 face mask use skin-friendly non-woven fabric, no irritation to your skin, High-elastic ear loops and adjustable nose clip to ensure a comfortable fit and no strain of ears. 【Perfect 3D Design】According to the human face, the 3D shape is designed with ergonomic to ensure the face mask can completely tights around face, mouth, nose and chin. You never need to worry about fogging your glasses and the Inserted nose clip falling off. 【Multiple Protection】Provides several times the protection of disposable masks, so you can rest assured whether you are at home, office, school, park, playground, shopping mall or other places. 【Thinner and Lighter】The masks are made of 4 layers but the protective effect is the same as the 5 layer mask. Thinner and in lightweight, more breathable. Suitable for daily wear even in hot weather. 【Disclaimer】This KN95 mask is NOT an N95 mask. For more information about KN95 masks please see the following before you purchase: amazon.com/AboutKN95s.