All you need is 20-22 in by 4 in of your scrap fabric and elastic hair bond.
Step 1: Cut your 20-22 in by 4 fabric, and fold in half and iron.
Step 2: Fold the edge going to ther center. Do the something to the other edge.
NOTE: It will easy to sew if you iron it first.
Step 3: Run top stictch at both edge...
Step 4: Make a flap by folding the end in 1/4 inch. Place the elastic hair band inside the flap and fold it again to the end and sew.
Step 5: Do this as well to the other end to connect.