| 摘要 |
A face mask comprising an elastic sheet and a filtering web. The elastic sheet defines inner and outer surfaces, and an elongated shape. The elongated shape forms a central portion. A cut-out is formed through a thickness of the elastic sheet at the central portion. The filtering web forms at least one pleat, and is bonded to the outer surface of the elastic sheet along a bondline. The bondline borders a chamber region at least partially established by the filtering web, with the cut-out being fluidly open to the chamber region. When worn, the inner surface is placed against the user's face, and a mouth and a portion of the nose of the user is inserted through the at least one cut-out. In some embodiments, the filtering web forms two vertical pleats that are located at opposite sides of a centerline of the face mask. |
