In what season does smog usually appear?

This kind of weather usually occurs in winter or spring. It has existed since ancient times. It’s just that the pollution now is too serious. So the haze weather became too much.

The Hydra Mask Terminator 2 is comfortable to wear and does not smell exhaust fumes. The filtration efficiency of filtering PM2.5, bacteria, viruses, air pollutants, car exhaust, formaldehyde, etc. below 0.25 microns is higher than 99%. It is safe and looks good to wear.