The sole structure illustrated in the drawings 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 broken, dot-dash lines in the figures are presented to encompass boundaries and surfaces which, along with the broken, dot-dash lines, do not form part of the claimed design. The shading is provided to show the complex curvatures (contouring) of the sole structure.