Small size Folding: 187 73mm Expand: 160 100mm Product Specifications: Bacterial Filtration Efficiency BFE 99.9% Particle Filtration Efficiency PFE 99.9% Virus Filtration Efficiency VFE 99.9% Innovative TYPECOOL+ filtration technology, ultra-strong filtration is extremely breathable, can maintain filtration efficiency for a long time, and the filtration efficiency is effective for more than 24 hours Ultra-low breathing resistance Breathing Resistance 2.4mmH2O Prevents droplets and splashes up to 160mmHg Special water-resistant ESPP smooth skin-friendly inner layer, care for the skin Comply with Korea KMOEL-2017-64 KF94 protective respirator standard Passed the U.S. NIOSH 42 CFR 84 N95 protective respirator filtration rate and breathing resistance test Comply with US ASTM F2100-19 Level 3 medical mask standard Comply with EU EN14683:2019 Type IIR medical mask standard Passed ISO10993-5 cytotoxicity and ISO10993-10 skin irritation/sensitization Biocompatibility tes