| 摘要 |
PROBLEM TO BE SOLVED: To provide a mask with a built-in fit checker capable of confirming easily adhesion onto a face.SOLUTION: A mask with a built-in fit checker, which is a mask having a filter, and an intake valve mounted inside a face body via a ventilation route, is fixed in the state of closing the intake valve by pressing the intake valve from the wearer side, to block the ventilation route temporarily, and to thereby confirm easily adhesion between the face body and a face.SELECTED DRAWING: Figure 1 |
