The ornamental design for a solestructure, as shown and described.
FIG. 1 is a bottom and front view in perspective of a sole structure showing my new design;
FIG. 2 is a bottom and rear view in perspective thereof;
FIG. 3 is a top view in plan thereof;
FIG. 4 is a bottom view in plan thereof;
FIG. 5 is a lateral side view in elevation thereof;
FIG. 6 is a medial side view in elevation thereof;
FIG. 7 is a front view in elevation thereof; and,
FIG. 8 is a rear view in elevation thereof.
The sole structure illustrated is a first embodiment showing a right-footed form of the sole structure for a shoe. A second embodiment of the sole structure is for the left-footed form of the sole structure for a shoe, which is a mirror image of the right-footed form, and which is not illustrated. The broken line illustration of environmental structure in the figures is not part of the claimed design.