The letter KF of KF94 mask stands for Korean standard, and the letter 94 stands for protection level. The filtration rate of particles with a diameter of 0.4μm is more than 94%, which is suitable for air pollution and environment with heavy virus. KF94 mask can be used for 48 hours, and it is not a disposable mask. KF94 mask mainly has dustproof function.

* * * There are four layers, 1 and 2 layers are non-woven fabrics, which play a role in blocking external dust, strengthening protection and reducing the risk of infection of users. The third layer is electrostatic filtering layer, which effectively isolates fine dust and harmful allergens. The fourth layer is the skin-friendly layer, which absorbs the moisture generated when breathing and keeps it dry and comfortable when wearing.

Effect:

This standard can effectively block the common carrier of the virus: droplets. The droplet diameter is generally between 1~4μm, and the filtering effect of KF94 mask can prevent droplets from directly contacting human respiratory tract and virus invasion.

However, since KF94 is not aimed at medical standards, there is no relevant standard for bacterial filtration rate in the production process. In addition, its outer layer material is the same as that of non-medical KN95 and N95 masks, and its splash resistance is not as good as that of medical masks. Once contaminated by droplets, it is still risky not to change the mask for a long time.

Therefore, KF94 can play the role of personal protection when going out, but the effect is slightly lower than that of KN95-level protective mask.