Petsafe Gentle Leader Quick Release Black Headcollar for DogsMore than 5 million dog owners have found the secret to controlling their dogs on walks. Imagine if each time your dog tugged on the leash, it turned him around. He just might find that he's not getting anywhere. That's the whole idea. The Gentle Leader headcollar fits securely over your dog's nose. The nose loop redirects his head towards you when he pulls forward, preventing pulling and giving you his full attention. Reduces pulling on the leash