Abstract: A structural cover skin for components of a fluid-medium craft, especially the foil components of the craft, wherein a layer of heat shrinkable, polymeric film, preferably of polyvinyl fluoride is bonded to a layer of heat-shrinkable polymeric film and/or fabric, preferably of polyester, to form a special laminated heat shrink covering material particularly useful for man-flown airplanes. A method for covering the frame portions includes an encapsulating envelope of the noted material or an overlapped wrapping which is heat shrunk tautly to the contours of the frame.