FIG. 1 is a side elevational view of an element of a shoe sole showing my new design;

FIG. 2 is a front elevational view of the element of a shoe sole of FIG. 1;

FIG. 3 is a rear elevational view of the element of a shoe sole of FIG. 1; and,

FIG. 4 is a top plan view of the element of a shoe sole of a shoe sole of FIG. 1.

The portion of the design illustrated with shade lines that normally designate transparent material is intended to illustrate an iridescent appearance. The broken line showing of the shoe upper and shoe sole is for illustration purposes only and forms no part of the claimed design.