PriyoShop is presenting to you the KN95 5 Layer Best Protection Face Mask China Certified (20 Pieces Pack). This respirator is for at least 95 percent filtration efficiency against certain non-oil based particles and aerosols. Five layer design, filter the pollution, gases, odors, dust, pollen, smog, PM2.5, germs, bacteria effectively. 3D and lightweight design, the initial pressure drop makes you breathe easier. High-quality elastic band, easy to wear and comfortable.