Stent and stent delivery device

An implant device comprising:

• a tubular first layer with a space therethrough;
• said tubular first layer having a first braid with a first porosity and being entirely composed of a single shape memory metal wire;
• and,
• a tubular second layer located within said space within said tubular first layer;
• said tubular second layer having a second braid with a second porosity that is lower than said first porosity and being composed of shape memory metal wire;
• wherein said tubular second layer is connected to said tubular first layer at one or more locations so as to allow for radial expansion and delivery at about the same time.