| 摘要 |
A mask is formed of an upper part, a lower part opposing the upper part and having a form generally similar to that of the upper part, and a connection part for connecting a lower edge of the upper part and an upper edge of the lower part. The left edges of the upper and lower parts are joined, and the right edges of the upper and lower parts are joined, while the upper edge of the upper part and the lower edge of the lower part are not joined. The connection part has a folding portion located between the upper part and the lower part, and is bent relative to the lower edge of the upper part and the upper edge of the lower part, so that the connection part does not protrude outwardly over the lower edge of the upper part and the upper edge of the lower part. Breathing can be made easily in the mask.
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