【Inserted Nose Clip-Anti Fall Design】--- The bendable metal nose clip is fixed to the inner of the mask. Compared with the outer glued design, you never need to worry about the Inserted nose clip falling off, and the flexible metal allows you to use a few ounces of force from your fingers to make the upper edge of the mask tightly fit your facial contours and prevent any particles from outside. 【5-Ply Protective Layer】--- Breathable face masks are made of high quality non-woven fabric. 2 skin-friendly non-woven outer Layers makes it breathable and comfortable. 2 melt-blown inner filter plays a filtering function, 1 non-woven Cotton Middle Layer absorbs the moisture from the breath, 5-ply KN95 mask is designed to offer more protection than a standard disposable 3-Ply mask. 【Thickness is not protection】--- The inner material --melt blown cloth is playing a filtering function. It’s fiber diameter on it only 1 to 5 microns. These ultra-fine fibers with unique capillary structure make the melt blown cloth have good filtering and shielding properties. kn95 have 2 layer 95+ level melt-blown cloth, which has a smaller fiber diameter and a higher filtration rate than ordinary disposable masks.This is why KN95 masks can provide extra protection to you.