The ornamental design for a strapoverlay for an article of headwear, as shown and described.
FIG. 1 is a perspective view of the strap overlay for an article of headwear.
FIG. 2 is a front view thereof.
FIG. 3 is a back view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a left side view thereof.
FIG. 6 is a top view thereof.
FIG. 7 is a bottom view thereof; and,
FIG. 8 is an article of headwear illustrating the strap overlay for an article of headwear shown in a position of use.
The back view of the strap overlay for an article of headwear is unornamented and therefore not shown in the drawings. The broken lines shown in the drawings outside of the claimed boundary form the structure of the article of headwear and unclaimed subject matter and form no part of the claimed design. The broken lines shown in the drawings inside of the claimed boundary illustrates an exemplary printed design on the strap overlay for an article of headwear and forms no part of the claimed design.