A dog that pulls is usually wearing a harness that rewards it. Clipping at the front turns the dog back toward you instead of letting it lean into the chest strap, and that one change does more than any amount of correcting on the walk. The grab handle across the back is the part owners end up using most: lifting a dog into a car, holding it steady at the vet, or getting quick control when something unexpected crosses the path. The bungee section in the leash takes the shock out of a sudden lunge, so it goes through the leash rather than your shoulder. Sizes S to XL, measured on chest girth, not weight.