No matter if your dog is wearing the Coastal Lazer Brite black pearl necklace dog collar, leash or harness, you know he or she will be visible at night. The Lazer Brite products are made from 3M Scotchlite™ fabric. This is the same fabric used on the protective gear of Law Enforcement agents, Utility workers, and Firefighters. This fabric is visible at a critical breaking distance of 600 feet. Scotchlite™ provides maximum visibility for your pet, including dogs with dark coats.