Key Specifications/Special Features: - Description: Disposable mask KN95 facemask no breathing valve - Filtration: Three-layer filtration, High-efficiency filtration, high-quality protection. -Material: First Layer:100% polypropylene; Second Layer:50% polypropylene,50% polyethylene; Third Layer: 100% polypropylene - Bridge nose: Can be adjusted freely to ensure the fit to the face - The ear cord: Soft and elastic, which helps to fit the ear - Packing:25pcs/box - Filtering Category:0.3 μm particle filtration�95% - Air mass flow: 85L/min - Aerosol-particle: NaC1 - Aerosol-concentration:15mg/m3 - Relative humidity:35.8% - Filter efficiency:�95.0 - Certificate of Conformity CE - FDA Certificate Of registration Fiscal Year 2020