For the lining, cut a piece of
adhesive fleece measuring 20 x 40 cm and iron it onto the back of one of your two fabric cuts. Remove the protective film from the fleece and iron on the second fabric cut.
Fold the bag into thirds. Stick a piece of velcro strap to the inside outer edge of the cable bag and to the outside of the bag so that the fastener turns the fabric into a handy pouch. If necessary, sew the fastener in place with a few stitches. Finish the edges with a zigzag stitch or another decorative seam. Do not place the fabric completely under the presser foot, but rather in such a way that the needle stitches into the fabric on the left and directly next to the edge of the fabric on the right, i.e. into the void. The zigzag stitch thus encloses the edge of the fabric.