Topstitching the edge is also an option if you don’t mind visible stitching.
This is a mega-list of hospital-approved face mask patterns. Find olson style & pleated “surgical-style” masks with filters, nose wires, ties, elastic, kids sizes, & pdf printables.
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Comfy sewing patterns to make and wear at home, including 3 FREE ones. The list includes tops, dresses, sweatpants, leggings, and cardigans.