optimal seat for the prosthetic 26 and prevents any blood from leaking around the prosthetic valve 26 over time the braided strand s promote ingrowth further improving the seal provided by the cuff 10 one embodiment of the present invention uses a non woven fabric to further enhance the seal created between the cuff 10 and the vessel walls fig8 shows a cuff 10 having a two ply body with a material 32 trapped between the two layers the non woven fabric expands easily such that the expansion characteristics of the cuff 10 are not affected additionally the material 32 may be impregnated with a therapeutic compound the material 32 can consist of a non woven material a woven fabric a polymer or other material referring now to fig9 and 10 the cuff 10 originally depicted in fig1 and 2 is shown with a plug 30 expanding the central lumen 16 of the cuff 10 this demonstrates how the cuff 10 shortens and the ends 12 and 13 fold back when the lumen 16 is expanded expanding the central lumen 16 thus causes the ends 12 and 13 to create a strong grip on native tissues such as valve leaflets lodged.