We claim the ornamental design for a shower stretcher, as shown and described.
FIG. 1 is a top perspective view of a shower stretcher;
FIG. 2 is a first end elevation view of a shower stretcher;
FIG. 3 is a second end elevation view of a shower stretcher;
FIG. 4 is a first side elevation view of a shower stretcher;
FIG. 5 is a second side elevation view of a shower stretcher;
FIG. 6 is a top plan view of a shower stretcher; and,
FIG. 7 is a bottom plan view of a shower stretcher.
The ornamental design which is claimed is shown in solid lines in the drawings. Any broken or phantom lines in the drawings form no part of the claimed design.