Face Mask and Method of Manufacturing the Same

摘要

A mask includes a filter layer and a support base supporting the filter layer. The filter layer has first and second complimentary portions that together form a rim, where the first portion is connected to the second portion at first and second seams. The first seam extends from the rim to a first pleat, while the second seam extends from the rim to a second pleat. The first pleat is connected to the second pleat by an unpleated central portion. The first pleat, second pleat and unpleated central portion are formed by the first and second portions of the filter layer.