The ornamental design for a jacket, as shown and described.
FIG. 1 is a rear left perspective view of a jacket showing our new design in an in-use state;
FIG. 2 is a rear right perspective view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a rear right perspective view of an alternate embodiment of a jacket showing our new design in an in-use state;
FIG. 7 is a rear left perspective view thereof;
FIG. 8 is a rear view thereof;
FIG. 9 is a left side view thereof; and,
FIG. 10 is a right side view thereof.
The broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The broken lines depicting the remainder of the jacket show features that form no part of the claimed design.