A vascular occlusion device for effectively occluding blood flow and pressureto avascular defect while simultaneously not occluding blood flow and pressure toadjacentvasculature is provided. The vascular occlusion device can include a tubularmember that hasvariable porosity regions along its length. The tubular member can be formedof a plurality offilaments that have different cross-sectional shapes along their length thatare indexed to thevariable porosity regions along the length of the tubular member.
