Comrades, who knows where to sell N95 masks and how much they cost? It's better to be from Chaoyang District!

N95 is standard for masks. Generally speaking, the particle size of 0.3 is the most difficult to filter and intercept 95%. Generally, it is particulate matter interception. Because viruses usually float on particles, they are stopped.

It seems that the inner and outer surfaces are all non-woven fabrics, and the middle is an electrostatic cotton filter screen, which absorbs particles by static electricity and generally cannot be washed off. Change it when it is dirty. Generally not more than 10 yuan and 6 yuan. No matter how expensive it is, it is not worth it. It is also a false price. The blue N95 used in some hospitals may be a little more expensive, but it's not worth it.