US D573780 S1
The ornamental design for a footwear sole, as shown and described.
FIG. 1 is a top perspective view of a footwear sole showing our new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a front elevational view thereof; and,
FIG. 8 is a rear elevational view thereof.
The outermost broken line forming a rectangle with rounded corners in FIGS. 2 & 3 defines the interior boundary of the design. The broken lines and the areas within them, form no part of the claim.