Stops lead pulling quickly and comfortably Easy to fit and easy to use Veterinarian and trainer recommended Martingale chest loop redirects forward motion & prevents twisting4 adjustment points provide maximum comfort and reliable fit2 quick-snap buckles for easier fit Soft nylon material1.8m nylon lead and training guide included System Includes Dog harness, 1.8m nylon lead, Fitting Guide Small size for pet width of 38-51cm, Jack Russell, Miniature Poodle, Sheltie