All of our products are manufactured in the US. Specifically in Southern California. Our masks are beyond required specifications in terms of performance. Our masks are reusable. Our masks are really comfortable. Our NanoScreenâ?¢ PPE Filtration Technology is ASTM Lab Tested to Deliver Excellent Viral & Bacterial performance, capturing over 99% of all airborne particulates in both directions down to 20nm (the SARS-CoV-2 / COVID-19 molecule ranges in size from 60nm to 140nm). We have 4 different styles to choose from. Please understand that these are not cheap inexpensive mass produced disposable products. These are high quality nanotechnology products made by technicians by hand in California.