A Stent-graft (10) comprising an inner stent (11) having a wall structure (12) including juxtaposed strut-patterns (13 - 17) with interconnected struts (18) and connectors (20 - 27) connecting the strut-patterns (13 - 17), the wall structure (12) of the inner stent (11) having a predetermined length (L 1 ), an outer stent (28) coaxially arranged around the inner stent (11) and having a wall structure (34) including juxtaposed strut-patterns (29 - 33) with interconnected struts (35, 36) and connectors (37 - 44) connecting the strut-patterns (29 - 33), the wall structure (34) of the outer stent (12) having a predetermined length (L 2 ) and a flexible stretchable material layer (45) arranged between the inner stent (11) and the outer stent (28), wherein the wall structure (12) of the inner stent (11) has a design differing from the design of the wall structure (34) of the outer stent (28) and wherein the length (L 1 ) of the inner stent (11) is equal to the length (L 2 ) of the outer stent (28).
