A well-loved haberdashery in the sewing world is undoubtedly "elastic"! You can attach it to your fabric and your project is immediately finished! Moreover, they are available in different colours and prints, so you will surely find the "right" elastic for your project. Elastic is often used to attach to the edge of a garment so that the garment in that place will adapt to the body, therefore the garment will stay in place perfectly.