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

FIG. 2 is a first side elevational view thereof;

FIG. 3 is an opposite side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

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

FIG. 7 is a bottom plan view thereof.

The broken lines in FIGS. 1-7 represent the boundary of the design, while the broken lines showing the remainder of the footwear illustrate the environment in which the design resides. The broken lines form no part of the claim.