Wooly nylon is thick sewing machine thread that completely covers the spaces between horizontal stitches, producing a decorative edge with a single seam. Zigzag stitching with wooly nylon creates the effect of midi-braid. It can make a simple overcast stitch look like a rolled hem. A hem seam sewn with wooly nylon is all the trim you need for decorative table linens, and wooly nylon matched to the fabric creates a subtle tone-on-tone effect reminiscent of couture linens. You cannot thread a sewing machine needle with wooly nylon, so it is used in either the bobbin or the loopers.
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Using a Standard Sewing Machine
Fill a bobbin with wooly nylon and insert it into the machine.
Thread the top of the machine with clear sewing thread.
Sew with the fabric wrong side up, using a zigzag stitch and a short stitch length. Use the stitch width appropriate for your project. The decorative seam will be on the bottom side of the fabric as you sew.
Using a Serger
Thread one of the needles with thread that matches your fabric. Use the inside needle for a narrow edging and the outside needle for a wide edging.
Thread the loopers with wooly nylon.
Sew along the desired edge of the project to create a covered edge.