| 主权项 |
1. A face mask for filtering contaminants from air, comprising:
an air-permeable body having an inner surface, wherein said body is sized to cover the nose and mouth of a subject when worn by said subject, said air-permeable body is substantially rectangular in shape, and a portion of at least one corner of said air-permeable body is folded towards said inner surface, thereby creating at least one two-layered region of said air-permeable body when worn by said subject, and wherein the width of said air-permeable body at said two-layered region is less than the width of said air-permeable body at it widest point; an inner seal connected to said inner surface of said body; and at least one strap connected to said body for securing said face mask to said subject's face. |
