This is a multi-center, open-label extension trial conducted at the same European sites that participated in trial SP 709 (NCT00243217). The trial is designed to collect long-term safety and tolerability, efficacy correlates, and quality of life data in subjects with idiopathic Restless Leg Syndrome (RLS). The duration of treatment is approximately 5 years. Subject will be up-titrated to their optimal dose (administration of 1 patch per day, 5 different doses and patch sizes).