DIY Face Mask With Filter Pocket : 10 Steps (with Pictures ...
Fold the 1/4" excess over to the front of the mask and pin in place. Sew the bias to the mask using a 1/8" edge stitch. Repeat these steps for the opposite side. Fold the bias tape out and press the 1/4" folds down with an iron. Repeat for both sides. To finish the bound edges, fold the bias in towards the mask 2 times and pin in place.