What kind of mask do you choose in foggy weather?

Children under the age of six are advised not to go out for outdoor activities in foggy days. You can wear a 3m small mask over six years old, and it is best to wear an exhalation valve mask, so that breathing is smoother and breathing pressure is much lower.

Masks for PM2.5 children in foggy days must be carefully selected, especially for children with poor respiratory tract, which is easy to attack recently. When choosing masks for children, don't choose flowers. Good-looking is not practical, inferior benzene will exceed the standard and can't protect you. In addition, don't buckle your ears when wearing a mask. It's best to tie it around your neck and head.

If the smog is serious, you should buy N95 masks. It's not serious and unnecessary, but the fit is really important.