FIG. 1 is a prospective view of a side element of a shoe upper showing my new design;

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

FIG. 3 is a front view of the side element of a shoe upper shown in FIG. 1;

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

FIG. 5 is a top plan view of the side element of a shoe upper shown in FIG. 1.

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