First, take your fabric and cut it into a square that is a few inches longer than a pencil. Then, cut a long narrow strip.
Fold square piece in half and use your needle and thread to sew the two shortest sides. Sew about an inch away from the edge of the fabric to ensure that you have a strong seam.
Next, fold over the edges of your pouch so that about an inch of fabric is hanging over on all sides. Take your hot glue gun and use it to secure this edge all around your pouch.
After you have glued the top edge of the pouch, turn the pouch inside out. Next fold over and sew the edges of strip of fabric.
Then, take one end of the band and use your hot glue gun to attach it to the center of your pouch, near the bottom. Next, take Velcro and glue one and the other piece of Velcro to the other end of the band as shown.