The SPORN® Non-Friction Leash™ helps provide comfort to the dog owner by absorbing stress caused by sudden leash pulling or lunging. It's patented design has an elasticized outer sheath that stretches and moves with your grip, thus eliminating rope burn type friction against your hand. The inner core is made of solid rope, therefore the actual leash does not stretch out like most bungee leashes; It provides tight control when necessary!