Portion of a midsole of a shoe

FIG. 1 is a perspective view of a midsole of a shoe showing my new design;

FIG. 2 is a side view of the midsole of a shoe shown in FIG. 1;

FIG. 3 is a front view of the midsole of a shoe shown in FIG. 1;

FIG. 4 is a rear view of the side midsole of a shoe shown in FIG. 1; and,

FIG. 5 is a top view of the midsole of a shoe shown in FIG. 1.

The uneven broken line immediately adjacent to the shaded area represents the bounds of the claimed design. All other uneven broken lines represent the remaining portion of the shoe. The uneven broken line representations in FIGS. 1-5 are for illustrative purposes only and form no part of the claimed design.