1. Prepare the pieces you will need.
  2. Cut a piece of style string 3”/7.6 cm longer than the pre-cut stretch fabric.
  3. Fold the fabric lengthwise with the style string inside along the fold.
  4. Spot stitch the end of the style string to the side seam.
  5. Thread the machine with style string and sew rest of the seam.
  6. Pull the long string until fabric bunches and flip inside out.
  7. Push elastic through and tie the ends together.
  8. Insert one end of fabric into the other end and sew. Do not sew through elastic.