Can medical masks really prevent pm2.5?

If it is really a mask that can prevent pm2.5, the density of the mask is generally very small, which is estimated to make you uncomfortable to breathe.

To stop pm2.5, you need a medical n95 mask, which can resist 95% of 0.3 micron particles and play a certain role in pm2.5 weather off the charts, but this mask is terrible. After wearing it, you will know how bad your breath is at ordinary times, and you will find that the world there is unbearable. In a city like Beijing, you need to wear a mask to the streets at least 100 days a year.

You'd better wear a mask when you go out in foggy weather. Active carbon filter mask is the most effective. However, due to the high filtration efficiency, the corresponding respiratory resistance is greater, and long-term wearing will cause physical discomfort. The deputy chief physician of the Department of Respiratory Medicine of Beijing Chaoyang Hospital suggested that citizens who are sensitive to climate change can choose to wear disposable medical activated carbon masks.

Taiwan Province Modaishu medical activated carbon mask is good.