Harley-Davidson Reflective Bad to the Bone Nylon Collar - Dog Collars from petco.com Who's bad? Bad to the Bone that is and we're talking attitude. Your ruff and rugged pooch gets the chance to sport the fierce biker fashion that Harley-Davidson has immortalized with this no-nonsense nylon weave collar. This collar is adjustable to fit your dog as he grows. Black lettering spells out HARLEY-DAVIDSON with black flames in between each exclamation of badness. Pair with a matching leash for a completely cool look.