The advantages are that it can be well smeared on the face, and it can prevent droplets in the air, in which all attached viruses, such as dust, microorganisms and acid fog, can be stopped, and its stopping effect is very good; The disadvantage is that it is not suitable for people with big faces.

& gtKF94 mask is a Korean standard medical mask, and its blocking ability to novel coronavirus is basically similar to N95 mask and KN95 mask. In daily life, especially in dense crowds, the rational use of KF94 mask can obviously prevent it, and its filtering function can be enhanced through KF94 mask to achieve the purpose of prevention.