Blueberry Pet 3/4-Inch Classic Solid Adjustable Dog Collar, Medium, Olive Green Medium Width 3/4", Neck 14.5-20" Medium Width 3/4", Neck 14.5-20" Since the reflective threads are stitched into the nylon webbing, it is normal to see that the reflective strings are frayed with the stiches where two layers of webbing are connected. The durability of this collar will not be affected. Please note that the reflective threads are stitched into the webbing on one side only. This collar is a single product. However, it comes with matching leash/harness to complete the look. Leash and harness sold separately. Picture was taken from a size Medium (Width 3/4", Neck 14.5-20").