Disclaimer
My expertise is in logistics and the process of sourcing and procurement. It is not in medical supplies. I found the manufacturer for PPE through a QC and logistics agent I have worked with for years, who is helping to vet and communicate. The manufacturer has provided documentation to show they are licensed to produce KN95s and that they are produced to meet a quality standard. However, given that the KN95 is not officially FDA-approved nor recognized as an official N95 equivalent, any purchase of these masks should come with the understanding that they are being imported from overseas to be used at your own discretion.
If you have specific questions about the masks I can help to ask the manufacturer.