The ornamental design for a jacket, as shown and described.
FIG. 1 is a left side front perspective view of a jacket showing my new design;
FIG. 2 is a right side front perspective view thereof;
FIG. 3 is a left side rear perspective view thereof;
FIG. 4 is a right side rear perspective view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a left side view thereof; and,
FIG. 9 is a top view thereof.
The uneven-length broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The even-length broken lines within the shaded area represent stitching which forms no part of the claimed design. The uneven-length broken lines depicting the remainder of the jacket show features that form no part of the claimed design.