The ornamental design for a headrest for a vehicle, as shown and described.
FIG. 1 is an environmental front and right side perspective view of a
headrest for a vehicle, showing my new design, the portion of the figure
shown in broken lines representing the interior of a vehicle and forming
no portion of the claimed design;
FIG. 2 is a rear and right side perspective view thereof, the left side
view being substantially a mirror image with the exception of the zipper;
FIG. 3 is a top plan view thereof, the bottom plan view being substantially
a mirror image; and,
FIG. 4 is a front elevational view thereof.
The broken line showing on the surface of the design in the various figures
represents conventional stitching.