FIG. 1 is a left side elevational view of a heel portion of a combined heel-sole unit showing my new design, the right side being a mirror image thereof, the broken-line showings being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof.