A dog body harness is a piece of equipment that works as an alternative to a leash. It works in conjunction with a collar and allows pet owners to walk their dogs without the danger of choking their pets. It can be a step-in, standard, vest, built-in or easy-on harness.
Most pet owners use a harness because it puts less pressure on dogs' necks than traditional collars. While it still does apply pressure to the dog's body, a harness allows the pressure to distribute across less sensitive body areas of the animal, such as the chest and the flank. It also allows the dog to match the pace and direction of the owner as the harness naturally keeps the animal walking with his shoulder and side by the owner's side.