The ornamental design for a solestructure, as shown and described.
FIG. 1 is a rear and lateral side view in perspective of a sole structure showing my new design;
FIG. 2 is a bottom and medial side view thereof;
FIG. 3 is a lateral side view thereof;
FIG. 4 is a medial side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a front view thereof; and,
FIG. 8 is a rear view thereof.
The sole structure illustrated is a first embodiment showing a right-footed form of the sole structure. A second embodiment is for the left-footed form of the sole structure, which is a mirror image of the right-footed form, is not illustrated. The crosshatched/shaded areas of the figures represent a contrast in appearance and do not represent any particular color, material, texture, or finish. The broken line illustration in the drawings depicts unclaimed portions of the sole structure, as well as environmental structure in the form of a shoe upper, both of which form no part of the claimed design.