1. The sponge strip in the mask can reduce the pressure on the face caused by the nose clip when we wear the mask, and can also block the hot air generated by our breathing, so as to avoid the fogging of glasses when we wear the mask.

2. At the same time, it can also block the heat generated by our breathing, so that when we wear a mask, our glasses will not fog. However, sponge strips can't filter bacteria and viruses well, so they should be used with caution.

3. Mask is a very common thing in our life. Wearing a mask can help us resist respiratory infectious diseases when we are in a crowded place with poor air circulation.