S-Lines Jump Rope (Standard)S Lines Jump Rope (Standard) The S Lines Jump Rope is a handmade tournament jump mainline built with standard loops for the pylon and a double thick jump switch where the rope takes the most load. Double thickness through the switch is where jump ropes most often wear or fail building it in from the start adds usable life across competitive sessions. The handle end of the rope is finished with a larger opening so you can swap handles between sessions