We know that the protective effect of the mask depends on the filtering effect of the mask fabric, the fitting degree of the mask with the face and the bridge of the nose and other factors. Can wearing two or more masks at the same time increase the protective effect?
The reason why the mask can play a protective effect is mainly through the following two points:
1. Make sure that air does not enter the inside of the mask through the side face or the bridge of the nose. Because the air in these two places is not filtered at all, and the virus particles directly enter the respiratory tract. From this point, the fitting design of the side of the mask is very important, followed by the fitting of the upper part of the mask and the bridge of the nose. Here, it mainly depends on the role of the bridge of the nose. A good nose wire can perfectly stick the mask to the bridge of the nose. Wearing more than one mask may lead to bad fit of the mask, but let the virus particles have the opportunity to enter directly;
2. Let the air enter the mask only through the multi-layer filter cloth of the mask, and keep the virus particles out of the mask. It is usually three or five layers of cloth. If you wear two masks at the same time, it will make the wearer feel uncomfortable and increase the difficulty of breathing. Tightening the ear cord is particularly uncomfortable. Multi layer cloth will make it difficult for the exhaled gas to be discharged in time, and it will wet the mask in a short time, so that a large number of bacteria will adhere to the inside of the mask.
Therefore, wearing two or more masks at the same time can not improve the protective effect, but it plays a bad role. Just wear one mask correctly.