The ornamental design for a pullovertowel, as shown and described.
FIG. 1 is a perspective view of a pullover towel, as worn, showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a side view thereof; and,
FIG. 5 is an opposite side view thereof.
The small-dash, broken lines applied to the pullover towel, which appears throughout FIGS. 1-5, represents unclaimed stitching. The large-dash, broken lines within the pullover towel or extending therefrom represent an unclaimed mannequin in FIGS. 1, 4 and 5. The cross-hatching in FIGS. 1-5 represents shading. All broken lines form no part of the claimed design.