The described invention provides an endovascular stent device comprising a tubular structure comprising a circumference； wherein a flow-diverting portion of the circumference is covered by a flow-diverting material； a length (l) from a proximal end to a distal end； and an inner diameter (d)； wherein the flow-diverting portion of the circumference comprises a length (l′)； and the flow-diverting portion of the circumference covers at least 1% to at least 100% of the endovascular stent device. According to some embodiments, the flow-diverting material is adapted to increase blood vessel wall adherence and minimize risk of an endoleak.
