Slide outs were first installed in RVs in the late nineties to add a little extra sleeping space in cramped up RVs. However, the Performance S already boasts exceptional sleeping quarters, so the slide outs are used to make the lounge area bigger. When stopping for a drink or a meal, the coach can slide out by an incredible eight-feet on both sides. The slide outs give the coach a more homely feel and are among the most standout features in the Performance S.