| 摘要 |
PROBLEM TO BE SOLVED: To provide a mask that is convenient to use. SOLUTION: The mask 1 includes an upper portion (a), a lower portion b of approximately the same shape as the upper portion (a), and a connection C connected to the lower edge a2 of the upper portion (a) and to the upper edge b1 of the lower portion b. The upper portion (a) and the lower portion b are opposite to each other, and the lower edge a2 of the upper portion (a) and the upper edge b1 of the lower portion b are bent so that the connection C does not protrude outwardly of the lower edge a2 of the upper portion (a) and the upper edge b1 of the lower portion b. A folding portion C0 which is folded back at a position inward of the lower edge a2 of the upper portion (a) and the upper edge b1 of the lower portion b is provided at the connection C. The upper edge a1 of the upper portion (a) is not joined to the lower edge b2 of the lower portion b and the lower edge a2 of the upper portion (a) is not joined to the upper edge b1 of the lower portion b. The left edge a3 of the upper portion (a) is joined to the left edge b3 of the lower portion b and the right edge a4 of the upper portion (a) is joined to the right edge b4 of the lower portion b. The upper edge a1 of the upper portion (a) is approximately parallel to the lower edge a2 of the upper portion (a) and the upper edge b1 of the lower portion b is approximately parallel to the lower edge b2 of the lower portion b. |
