NASK Nanofiber Smart Mask (Bactericidal Surgical Respirator)

In April 2020, the Hong Kong Hospital Authority formally adopted the NASK Nanofiber Smart Mask (Bactericidal Surgical Respirator) - Professional Edition (CE FFP2 Type IIR) which is the special model for medical and related institutions. The relevant facial seal leak test also has very good results.

https://youtu.be/SjpB5FmDVlM (Chinese Version)