Premier Easy Walk Dog Harness
Though there are several no-pull options on the market, PetSafe's Easy Walk Harness is the fool proof one that will discourage even the hardest puller. Because the leash attaches to the front of the dog's chest rather than between the shoulders you will have an easier time redirecting and steering even a powerful or reactive pooch. When your dog pulls against the leash he will immediately turn towards you due to the front attachment which will encourage his attention to be on you. Though this harness comes in all sizes, it is designed and the most appropriate for a medium to large sized dog.