On haze days, some people wear ordinary cotton masks, medical blue masks, and some people choose insert-type anti-fog and haze masks, and some people choose folding test masks. . . . . .

First of all, look at the logo. Choose anti-haze products with anti-PM2.5, N, KN and other logos. Generally, N95 is used to indicate that the capture capacity of particles smaller than 2.5 microns is 95%, and it is labeled KN90. The capture capacity is 90%.

Choosing a mask is not as thick as possible, and it is not necessary to blindly pursue anti-haze ability, especially for people with respiratory diseases and the elderly and young children, it is not appropriate to use a tightness and poor ventilation.

First of all, due to the different face shapes, it is best to try on it first, so choose a mask that has a good fit. At the same time, look at the packaging logo before buying, especially when choosing for children. Some masks are suitable for 1 and a half to 3 years old. Some are suitable for children over 3 years old, and some masks are not suitable for children.

In addition, anti-haze masks are prone to bacteria if they are not cleaned in time or worn for a long time, so disposable masks should be replaced every day, non-disposable masks should be cleaned daily, then hot water for a few minutes, and then dried in the sun, And some masks are inserted into the filter, the filter needs to be replaced according to the use time.