Long before the "Covid-gate", it was planned in my creations that I would make masks. Indeed, the Japanese being very respectful, they have been wearing a mask for a very long time when they are sick, even if it is only a flu. It has therefore been common for many years to see masked characters in manga. It has even almost become a fashion accessory because we often see it at conventions. The masks I make are on the AFNOR model, they have 2 layers of cotton and one of polyester. They also incorporate a metal wire at the nose for better tacking. These are not medical devices and current regulations require disposable masks in public places to fight Covid.