Cetacea was one of the first companies to introduce the step-in harness to the pet industry. Now it's an industry standard and the preferred harness design. The step-in concept is simple - "pet simply steps in" and it buckles securely near the dogs back. The design catches the dog low across the chest to disperse the load and keep your dog from experiencing damage to the trachea from other pulling. Two solid brass d-rings provide a very secure attachment point for the leash. Unlike a traditional h-shaped harness the step-in dog harness does not have to be pulled over the dogs head (they don't like that). The harness is adjustable in locations to fit practically any sized dog.