FIG. 1 is a bottom perspective view of a footwear sole illustrating my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right shoe elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top elevational view thereof; and,

FIG. 7 is a bottom elevational view thereof.

The broken lines showing the boundaries of the shoe sole are for environmental illustration only and form no part of the claimed design.