According to the management of medical devices, masks are divided into three kinds, the order of the level of protection is medical protective masks＞surgical masks＞medical masks (single-use medical masks), all in accordance with the management of Class 2 medical device products. Ordinary gauze masks cotton, cloth masks are not managed as medical devices.

Masks are mainly classified according to the function as follows:
1, ordinary masks (non-medical):
Such as cotton masks, activated charcoal masks, gauze masks, etc., can be used to prevent freezing, dust, part of the haze, but can not be used to prevent the spread of bacteria and viruses.

2, ordinary medical masks:
The protective effect of pathogenic microorganisms is not exact, and can be used for disposable hygiene care in the ordinary environment, or the blocking or protection of particles other than pathogenic microorganisms, such as pollen. Protection is lower than medical surgical masks, can be used in non-intensive crowd.

3、Medical surgical mask:
Protective effect is much better than the general class, before the hospital used more, commonly used in respiratory and surgical use, can be used to prevent the spread of germs and bacteria. Apply to the basic protection of medical personnel or related personnel, as well as in the invasive operation process to prevent the spread of blood, body fluids and splash protection.

4、KN95/N95:
N95 does not fully belong to the medical protective mask, generally contains N95 medical protective masks and N95 industrial masks.
Medical protective N95 masks, for medical personnel and related staff of airborne respiratory infectious disease protection, high level of protection.N95 is the U.S. NIOSH dust mask standard, the domestic standard is KN95, the detailed parameters and domestic KN95 consistent.
N95 mask anti-haze is more reliable, the main component of haze pm2.5 is non-oil particulate matter. At the same time can be used to protect bacteria and virus transmission, is currently able to buy the highest level of protection of daily masks. kn95 and n95 just name is not the same, in accordance with the two standards produced by the mask level of protection is exactly the same, the protective effect does not differ.

Their protection level is: KN95/N95 mask ≈ medical surgical mask > ordinary medical mask > ordinary mask.

5、Children's mask
Suitable for 6-14 years old children, according to the size of the face to choose. Fit the face, high airtightness, safe and comfortable.
Children's masks are also national standards, pay attention to selecting children's national standard GB/T 38880-2020, bacterial filtration efficiency ≥ 95% of the mask.