"This ultra featherweight Pellon is perfect for using for cotton masks during this cover-19 pandemic. Two layers of fabric with 2 layers of this interfacing is still quite breathable. The regular featherweight is a bit too thick, so I used only 1 layer. I was making masks with pleats, so they tended to be bulkier."
PELLON PLF36 Ultra lightweight Fusible Interfacing 15" x 3yd - for light to midweight fabrics