Abstract: A prosthetic material having non-thrombogenic properties for the vascular system of the body. The material has a base layer made from a suitable material, and a thin substantially amorphous or quasi-amorphous and preferably non-continuous layer made from a suitable metal covering at least part of the base layer. The metal layer is made from a suitable metal such as to provide a substantially non-positive electrode potential with respect to a bloodstream in contact with said metal layer. The metal layer forms the bloodstream facing surface of the prosthetic material, which may be adapted to provide patches, prosthetics and other components suitable for the vascular system.