US D614742 S1
The ornamental design for a shower system, as shown and described.
FIG. 1 is a front/left side perspective view of a shower system;
FIG. 2 is a front/right side perspective view of the shower system of FIG. 1;
FIG. 3 is a front elevation view of the shower system of FIG. 1; and,
FIG. 4 is a top plan view of the shower system of FIG. 1, showing the left side shower system in an open position.
The broken lines are for illustrative purposes only and form no part of the claimed design.