How to make the mask fit well

For masks to be effective, masks must be the right size and the correct way to wear them. The masks sold on the market are generally divided into two types: rectangular and cup-shaped. 

Rectangular masks must have at least three layers of non-woven to have a protective effect. The user has to press the wire on the mask to the bridge of the nose and then spread the entire mask along the bridge of the nose to be effective. 

A rectangular surgical mask can be worn by a child because it has no fixed shape and can fit snugly against a child's face if tied well. The cup-shaped mask must ensure that the density of the mask is sufficient after it is attached to the face, and the exhaled air will not leak out to be effective. When wearing a cup-shaped mask, you can cover the mask with both hands and try to blow air to check whether there is air leakage from the edge of the mask.