MaterialMade of durable polyester, comfortable to use, easy to wash, with good and strong elasticity. Which means you can ensure you get the right trade-off between 'hold' and comfort, easy to install. Easy To InstallJust wear the elastic shoelace, and pass through the metal buckle, the tie knot, please kindly notice the length you need, cut the extra length shoelace, tighten the screw buckle, saving your time on tie your shoelace, no need to worry about the shoelaces will be loose. Magnetic Shoe Laces Metal BuckleSturdy and not easy to fall off the -magnetic buckle suction very strong -Metal strong magnetic plus hook double insurance-Metal material, light fast, wear resistant and corrosion resistant.don't worry about shoelaces loosening for no more tying and re-tying. Suitable for EveryoneThese elastic no tie shoelaces are perfect for kids, adults and seniors, and great for running, walking, hiking, biking and so on. no-tie laces are perfect solution whether you are an athlete that practices high impact sports, or simply can't or don't like tying shoelaces. Elastic Thickening ShoelacesFull of elasticity, Customers can cut the length according to their needs; The thickness is twice that of ordinary shoelaces and the wear resistance is not easy to break. The silky texture is more beautiful and extravagant.(Laces Package Include: 4 Magnetic lock +4 laces, enough for 2 pair of shoe).