Additional The KN95 Safety Respirator Mask is certified to conform to the CE European Standard for health, safety, and environmental protection. Factory is approved by the FDA. Rigid nose bridge ensures a tight and secure fit. High Quality Premium KN95 Respirator Face Mask Nose clip adjusts for air tight seal around your face Multilayer design provides 95%+ Filtration Rate Bacterial Filtration Efficiency (%) >95Particle Filtration (%) @ 0.1 >.30 MicronsDelta P Differential Pressure (mm h2o/cm2) Safety Mask, Nose Clip, Environmental Protection, Face Mask, Mask, Health, Design