•Filtration Efficiency: Non-oil Particles Filtration Efficiency(PFE): >= 95%
•Bacterial Filtration Efficiency(BFE): >= 95%
•Inspiratory resistance: < 350
•Expiratory resistance: < 250
•Layers and Materials:
•First Layer(Outer Layer): Non-woven fabric
•Second Layer: Melt blown cloth
•Third Layer: Melt blown cloth
•Fourth Layer: Filter sponge
•Function: Anti-bacteria, anti-smog, anti-pm2.5, anti-particles, anti-spray
•Product Size:16.5 * 11.5 cm
•Color: White,black,gray
•Package includes: KF94 masks
•Package size: 20.5 * 15.5 cm
•Gender: Unisex