Ji and n95 masks are air particle masks, which require that they can filter more than 95% of non-oily particles. It is mainly used for medical staff in hospital fever ward to avoid virus and bacteria infection and realize secondary protection.

N95 has better dust filtering effect than medical masks, and another feature is that the edge of the mask is very close according to the contour of human face.

Wearing method

If there is a gap between the mask and the face, when people breathe, the airflow will flow to the gap, and the dust, droplets and aerosols attached to the virus can enter the body through the gap with the airflow, causing infection.

Therefore, officers and men should wear masks regularly. When wearing the mask, first unfold the radian reserved layer of the mask, fix the mask on the face through the ear strap, completely wrap the mouth, nose and chin, then forcibly pinch the metal strip above the bridge of the nose to make it close to the bridge of the nose, and finally adjust the tightness of the chin. If necessary, the lanyard can be knotted from the back of the head to improve the tightness. Avoid touching the outside of the mask with your hands during the whole wearing process.