I claim the ornamental design for a “hat with opening for ponytail,” as shown and described.
FIG. 1 is a rear perspective view of a hat embodying my design, shown with the hair of a wearer being passed through an opening;
FIG. 2 is a rear elevation view of the design shown in FIG. 1;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a lower front perspective view thereof.
The hat shown in broken lines illustrate features of the article in which the design is embodied that form no part of the claim. The partial human figure shown in broken lines is environmental subject matter included to assist in showing how the design appears when worn, and forms no part of the claim.