The ornamental design for a side sole, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a side view of a side sole;
FIG. 2 is an opposite side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a front perspective view thereof.
The color shown on the claimed design forms no part thereof. The portions of the designs highlighted in light gray are for the purpose of illustrating environment only and form no part of the claimed design.