An N95 mask's material and filtration ability aren't “going to degrade unless you physically rub it ...
N95 respirators protect against exposure to airborne particles.
Medical surgical masks are divided into three layers: the outer layer is a water-blocking layer (ant...
The production of medical masks also has requirements for the production environment.
Face masks that have not been unpacked can still be used. In fact, as long as the surgical mask, med...
China was the first in the world to use masks. In ancient times, people in the court began to cover ...