Systems and methods for treating aneurysms

An apparatus for treating an aneurysm in a blood vessel, comprising:

• an occlusion device configured to be releasably coupled to an elongate delivery shaft, the occlusion device comprising:
• a cover having a proximal end, a distal end, and a longitudinal axis extending between the proximal end and the distal end, the cover comprising an inverted mesh tube having an outer layer and an inner layer, the outer layer transitioning to the inner layer at the distal end of the cover, the cover further comprising a first plane transverse to the longitudinal axis, wherein the inner layer defines an orifice having a first inner diameter residing within the first plane, and wherein the outer layer defines a first outer diameter within the first plane, the first inner diameter less than the first outer diameter;
• and
• a first tubular mesh having a first end, a second end, and a doubled-over shape, the doubled-over shape of the first tubular mesh having an apex between the first end and the second end of the first tubular mesh, wherein the apex defines a distal end of the occlusion device, and wherein the first tubular mesh in its doubled-over shape has a first transverse dimension configured to match the orifice, and wherein the first end and the second end of the first tubular mesh are secured close to each other within the cover.