The PetSafe 3 in 1 Harness has got it all! Designed for reducing dog pulling while maximizing comfort, adjustability and safety. No-pull multi-function + comfy!: The 3 in 1 harness can be used in many ways and is a great everyday harness for your dog. Attach your leash to the martingale chest loop to deter pulling, or attach to the back to use it as a standard harness for exercise. Or attach to both front and back using a double-ended leash! The leash offered is double ended in coordinating matching harness colors and measures 6' in length.