Using our own technology "TYPE.COOL+" to be super breathable filtering and enhances the performance of the mask incredibly .

And our product is passed below requirement and Certificate 

FDA 

• Bacterial Filtration Efficiency BFE>99.9%  
• Particulate Filtration Efficiency PFE>99.9% · 
• Viral Filtration Efficiency VFE>99.9%  
• Prevent droplets and splashes up to 160mmHg
• ASTM F2100-19 Level 3 Standard 
• EN14683:2009 Type IIR Standard 
• MEM Elution Test 
• Biocompatibility test of medical materials
• Microbial Cleanliness (Bioburedn) Test 
• ISO 14644-1 Class 7 Clean Room production Certification 
• ISO 13485:2016 medical equipment manufacturer Certification 
• Products Obtained CE / EU Certification 
• Made in Hong Kong