- High quality non-woven material complied with: + Level 3 ASTM F2100-19 + Type IIR EN 14683:2019 - Intergrated layers work together to maximize the breathability - Soft and comfortable ear-loops for easy wearing - Speciffically designed the inner of the face mask for better comfort - Particle Filtration Efficiency (PFE) >= 99% - Bacterial Filtration Efficiency (BFE) >= 99% - Viral Filtration Efficiency (VFE) >= 99% - Different pressure 4.0mm H20/cm2 - Flammability Class 1 - Synthetic Blood: 120mm Hg - Packing specification: + A pack of 50pcs/box + 50 boxes per carton + 2,500 pcs per carton