The ornamental design for a towel, substantially as shown and described.
FIG. 1 is an isometric view of a towel, showing our new design.
FIG. 2 is a front view thereof, which is a mirror image of the rear view.
FIG. 3 is a top view thereof, which is the same as the bottom view.
FIG. 4 is a right side view thereof, which is the same as the left side view.
FIG. 5 is a cross-sectional view of a portion of the towel taken along line 5-5 of FIG. 2.
FIG. 6 is a cross-sectional view of a portion of the towel taken along line 6-6 of FIG. 2.
FIG. 7 is a cross-sectional view of a portion of the towel taken along line 7-7 of FIG. 2; and,
FIG. 8 is an enlarged detail view of a portion of the towel taken from FIG. 4.
Stippling shown in the drawings provides surface shading and is not intended to indicate surface decoration. The towel is shown with a symbolic break in its width. The appearance of any portion of the towel between the break lines forms no part of the claimed design.