The ornamental design for an article of apparel, as shown and described.
FIG. 1 is a front elevational view of the first embodiment of an article of apparel showing the claimed design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a front view of a second embodiment of an article of apparel showing the claimed design;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a left side elevational view thereof; and,
FIG. 8 is a right side elevational view thereof.
The broken lines in the figures show portions of the article of apparel that form no part of the claimed design. None of the broken lines form part of the claimed design.
The contrasting shading in the drawings is used to illustrate a contrast in appearance.