FIG. 1 is a perspective view of a footwear sole embodying our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

FIGS. 1-6 show portions of an upper in broken lines. The upper is shown for environmental purposes and does not form any part of the claimed design.