Medical surgical masks can isolate large particles such as water droplets, and the outer layer is a waterproof layer that can block liquid splashes. However, the surgical mask cannot effectively filter small particles in the air, and the design of the surgical mask is not sealed, and cannot completely prevent air from entering through the gaps on the edge of the mask.
N95 mask is a particle protection mask that can filter non-oily solid or liquid particles with a diameter of more than 0.3 microns. But every time you wear an N95 mask, you must test the fit of the edge of the mask to ensure that there is no air leakage to have a real protective effect. Therefore, N95 masks are not suitable for people and children with a lot of hair on their faces, because people with such masks cannot guarantee the tightness of wearing N95 masks
In addition, people with chronic respiratory diseases, heart disease or other breathing difficulties should consult a doctor before using N95 masks, because N95 masks make it more difficult for the wearer to breathe.
Industrial N95 masks are mainly used when the air quality is not good. They can prevent or reduce the entry of dust, pollen, and germs in the air, such as preventing smog and PM2.5. N95 masks can also filter aerosols with a diameter of more than 0.3 microns, so whenever a large-scale epidemic spreads, N95 masks are also a popular choice for epidemic prevention masks