S-Lines Competition Series Slalom Rope Slide LoopS Lines Competition Series Slalom Rope Slide Loop The S Lines Competition Series Slide Loop is a tournament grade water ski slalom rope built around a moderate stretch fibre that helps skiers maintain and increase speed through the turn. After extensive testing, S Lines settled on a stiffness to stretch ratio that suits a diverse range of skiers not so stiff that the rope shocks the rider through the gate, not so stretchy that it absorbs the speed you