The ornamental design for a necktowel for hairstyling, as shown and described.
FIG. 1 is a perspective of a neck towel for hairstyling showing my new design in use;
FIG. 2 is another perspective view thereof, showing the neck towel in use; and,
FIG. 3 is a top plan view of the neck towel.
The broken lines in FIGS. 1 and 2, showing the design in use and representing the unclaimed portions of the design, are for illustrative purposes only and form no part of the claim.