The ornamental design for a shower system, as shown and described.
FIG. 1 is a front perspective view of a shower system according to the present invention.
FIG. 2 is a left side view of the shower system of FIG. 1.
FIG. 3 is a right side view of the shower system of FIG. 1.
FIG. 4 is a top view of the shower system of FIG. 1.
FIG. 5 is a bottom view of the shower system of FIG. 1.
FIG. 6 is a front view of the shower system of FIG. 1; and,
FIG. 7 is a rear view of the shower system of FIG. 1.
The dashed lines illustrate environment that does not form a part of the present invention, and no claim is made to the material illustrated with dashed lines.
The shower system is shown fragmented at the top and vertical bars to indicate non specified length.