e g barium sulfate bulk metals e g strips beads rings gold pt ir compounds such material may be added to the polymer backbone or in between the polymer backbone and the eptfe using methods similar to those described above as described above the composite films of the present invention may be used in a number of ways to make different structures and for use in a variety of application one such structure is a containment member which is usable with medical devices for treatment of a patient such as treatment of aaa in an exemplary embodiment a containment device is made from a composite eptfe material with an overall thickness less than about 0 00610 u2033 and comprises a layer of eptfe having a thickness less than about 0 0045 u2033 with an ind between ranging from about 0 1 to about 30 microns the containment member further comprises at least one layer of non porous thermoplastic polymer backbone material having a total thickness of about less than 0 0025 u2033 suitable thermoplastic materials include polyolefins e g polyethylene polyester terapthalate and ethylene vinyl acetates polyurethanes formulations such as biodurable aromatic polyether e g biospan elasthane polycarbonate e g bionate chronoflex carbothane silicone modified e g pursil polyurethanes and fluoropolymers e g fep pfa etfe that.