| 摘要 |
A dust mask, the dust mask being lightweight, disposable and configured for a human face, the dust mask further being substantially continuous, and unitary if desired, and sized and configured to extend from ear to ear and to cover all of and substantially only a mouth, nose and ears, the mask further configured to transmit air inhaled by or exhaled by the user yet substantially completely block at least dust from reaching the nose, mouth and ears of the user. The mask can be further configured to substantially completely block at least one undesired air-borne contaminant in addition to dust and can comprise a central portion covering the user's nose and mouth and two earpieces seamlessly attached to the central portion. The mask can further comprise a pliable, resilient nose bridge that can be adjusted to conform to the nose of the user as well as a variety of other structural elements and configurations. |
