Control Safety leash and collar setThis dog collars are designed to fit somewhat loosely around a dog's neck initially. However, in case your dog pulls during a walk, they have the remarkable ability to tighten as needed. Our chain martingale dog collar features two distinct loops. The first loop closely resembles a traditional nylon collar. It is adjustable, and when placed around the dog's neck, it should have a bit of looseness to ensure comfort. The second loop on the chain