To wear first-class protective equipment, you need to put a hat on your head, wrap our hair as much as possible, then put on a disposable surgical mask, press the metal strip on the mask to make it better fit our facial contour, and then put on isolation gown and gloves in turn.
Usually, disposable surgical masks need to be replaced after four hours of wearing. If you feel a strong moist feeling in the mask within four hours, you should also replace it immediately, so as not to reduce the protective power of the mask.