【Certified & 5-Layers KN95 Masks】All the YUIKIO Series KN95 Face Masks follow the GB2626-2019 respiratory protection standards. This standards require the filtration efficiency of KN95 mask at least 95%, that means our 5-Layer kn95 mask can greatly prevents unfiltered air from entering directly, keeping you from dust, PM 2.5, haze, smoke, automobile exhaust, etc..【Skin Friendly 3D Design】The well-made 3D face shape of KN95 mouth mask completely tights around face, mouth, nose and chin, prevent glasses from fogging. With high elastic and soft ear band, and the adjustable metal nose clip, offers you a comfortable wearing and protection experience..【Individually Wrapped & Portable & Foldable】Each of our KN95 masks are sealed in individual package and prevent secondary pollution. A lightweight and foldable design makes you easy to carry and fold..【Widely Applicability & Better Protection】This KN95 masks for adults use skin-friendly non-woven fabric, no irritation to your skin, and can be used indoors and outdoors, suitable for Commercial Buildings, Design & Construction,etc.Give you and your family a better protection..【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.