The ornamental design for a sunshieldheadwear accessory, as shown and described.
FIG. 1 is a front perspective view of the present invention.
FIG. 2 is a front elevation view of the invention as shown in FIG. 1.
FIG. 3 is a rear elevation view of the invention as shown in FIG. 1.
FIG. 4 is a left side elevation view of the invention as shown in FIG. 1.
FIG. 5 is a right side elevation view of the invention as shown in FIG. 1.
FIG. 6 is a top plan view of the invention as shown in FIG. 1; and,
FIG. 7 is a bottom plan view of the invention as shown in FIG. 1.
The dashed lines in the views form no part of the claimed design and reflect environmental subject matter. No claim is made to the inner surface of the sun shade.