Disclosed is an assembly for opening a vessel lumen comprising a radially expandable stent configured to open a vessel lumen, the radially expandable stent comprises a curved wall having a proximal portion, a distal portion and a lumen connecting the proximal portion and the distal portion. The assembly further comprises a knitted jacket comprising a plurality of interconnected loops, the knitted jacket further comprising a tubular wall that substantially surrounds an exterior surface of the radially expandable stent, and at least one retainer belt that slidingly passes through at least one knitted loop of the plurality of interconnected loops in the knitted jacket.
