FIGS. 4 to 6, 7 to 9, 10 to 12, 13 and 14 as well as 15 and 19 show further embodiments of contour shaping cap devices as a second sheathing system 4. The embodiments of the contour shaping cap devices as shown in FIGS. 4, 5, 6 and FIGS. 7, 8, 9, and FIGS. 10, 11, 12 differ regarding the angle of bending. All three embodiments of the contour shaping cap devices 40, 47, 48 and their respective half-shells 140, 147, 148, respectively, comprise openings 49 which openings are provided to prevent the formation of ice inside the contour shaping cap devices since under low environmental temperature the formation of ice inside the isolation formed by the contour shaping devices may be prevented which ice may otherwise be built because of condensate or water inside the contour shaping cap devices not being able to leave to the outside of the same. The shape, number, and the distribution of the at least one opening within the extension of the at least one of the half-shells of the contour shaping cap device can vary according to the requirements of the respective application. Thus, the at least one opening 49 can be provided within the area or extent of the half-shell, especially in the central region and/or in the edge regions or the end regions 420, 421 of the half-shell.