FIG. 1 is a bottom plan view of a sole for footwear, showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left perspective view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a perspective view thereof.

The broken line showing of environment in FIGS. 1-7 is for illustrative purposes only and forms no part of the claimed design.