This is a fantastic leash. It offers enough stretch so that your pooch can wander around a bit. We've also used this with the ruffwear harness that comes with http://www.backcountry.com/ruffwear-palisades-dog-pack-ruf0036 to teach our dog to bike-jore. I'll post a video below. He's still learning but this seems to be a solid system if you're into any sort of joring.