An occlusion device suitable for endovasculature treatment of an aneurysm in abloodvessel in a patient, including a substantially tubular structure having aproximal end region and adistal end region, having a first, expanded condition and a second, collapsedcondition. The devicehas dimensions in the second, collapsed condition suitable for insertionthrough vasculature of thepatient and through a neck of the aneurysm. The device further includes acontrol ring having asubstantially annular body disposed on the proximal end region of thestructure and at leastsubstantially circumscribing the proximal end region to prevent radialexpansion of the proximalend region and to provide an engagement feature during manipulation of theocclusion device.
