The ornamental design for a hat, substantially as shown and described.
FIG. 1 is a top view of the design for a hat;
FIG. 2 is a side view of the design for a hat;
FIG. 3 is a front perspective view of the design for a hat;
FIG. 4 is a front view of the design for a hat; and,
FIG. 5 is a rear view of the design for a hat.
The short hatch marks on the periphery of the triangle-like shapes which represent embroidery and the stippling inside the triangle-like shapes which represents material, are part of the claimed design. The hat which is shown in broken lines illustrates environmental matter and forms no part of the claimed design.
The entire surface of the hat which is in broken lines is shown for environmental purposes only and forms no part of the claimed design.