The occurrence of Peripheral Vascular Disease has been increasing which includes the large artery in the upper leg called Superficial Femoral Artery (SFA). The Peritoneal Lined Stent has been developed as a new method for treating narrowed area in the SFA. This research study will determine the safety and effectiveness of the Peritoneal Lined Stent in keeping th Superficial Femoral Artery open and allowing blood to flow in the leg.