I often go to the furniture factory, the workshop is always gray, what kind of mask can effectively

It's best to choose a medical N95 mask that needs to block the need for a medical N95 mask, which can resist 95% of micron particles, and it can also have a certain effect in the weather, but this kind of mask is terrible, after wearing it, you will know how bad your breath usually is, and you will find the world there unbearable. In a city like Beijing, you need to bring a mask to the street for at least 100 days a year.

If you want to buy a regular N95 mask that matches the size of your face, you should wait until the inside is dry and fold it in half to prevent the moisture from breathing on the mask from breeding bacteria. It should not be worn for too long, and the elderly and people with cardiovascular diseases should avoid wearing it to avoid dizziness caused by breathlessness.

You can pay attention to whether the mask has wire, so that the upper edge of the mask can be fixed on the nose to avoid the bridge of the nose being too high and leaking.