| 摘要 |
<p>Respirator (10) has a respirator body (11) that is configured to fit over the nose and mouth of a wearer. A thermochromic material (18) is positioned on the respirator body (11) such that the thermochromic material (18) makes thermal contact with the wearer's face when the respirator (10) is worn. The contact causes the thermochromic material (18) to change color to allow the wearer to determine if a proper fit has been established.</p> |
