The PetSafe 3in1 Harness is the perfect all-inclusive harness, designed for maximum comfort, adjustability and safety. The 3in1 Harness is a versatile harness that is great for everyday use. The harness can be used as a standard harness and can easily transition to a no-pull solution. It also features a car safety restraint options to limit your dog's movement in the car, creating a safer driving environment for the driver, passengers and pet.