Elastic rubber and polyesterColor: black & white size: 1m 2 pairNO NEED BINDING for CONVENIENCE- No Worry of tripped over by untied shoelaces. When you use, just slip the lock stopper with a slight pull on the rubber cord which will get stuck firmly by the lock with strong stainless steel springs, not easy to slip and saving you time.REFLECTIVE SURFACE for SAFETY - The rubber band of the surface on the Shoe laces are reflective which will improve visibility in the dark. It will be safer when you running outdoor day or night.DURABLE and FASHION - made of high-stretchy rubber and compact polyester, makes the shoe laces elastic and durable. And the fashion laces would be popular for kids or adults.FIT for MOST SHOES - The size fits most of shoes. The elatic laces is universal by design and is crafted to work with any shoe for running or other athletics. It is suitable for your sneakers, work shoes, boots, and even dress shoes.