Sure, the designs that have LED lights built into them may look neat, but they also serve a lot of functional purposes. If you take to take your pooch on a walk in the middle of a warm summer evening, you have the foresight to be sure that you wear reflective clothing so that you can be seen by a motorist, but you don’t do the same from your pooch. A design that has lights built right into it will make you and your pooch very visible from other pedestrians as well as motorists.