I claim the ornamental design for a visor cover for headwear cap, as shown and described.
FIG. 1 Is a top plan view of a visor cover for headwear cap
FIG. 2 Is a left side elevation view of the visor cover for headwear cap
FIG. 3 Is a right side elevation view of the visor cover for headwear cap
FIG. 4 Is a front elevation view of the visor cover for headwear cap
FIG. 5 Is a rear elevation view of the visor cover for headwear cap
FIG. 6 Is a bottom plan view of the visor cover for headwear cap
FIG. 7 Is a perspective view of the visor cover for headwear cap; and,
FIG. 8 Is a perspective view of the visor cover for headwear cap.
The ball cap illustrated by broken lines in FIG. 8 represents environmental structure, and illustrates how the claimed design may appear when used in conjunction with another piece of headwear, but forms no part of the claimed design.