FIG. 1 is a bottom view of a tread design for footwear;

FIG. 2 is a perspective view thereof, from the front of the outsole;

FIG. 3 is a perspective view thereof from the inside of the outsole;

FIG. 4 is a perspective view thereof from the outside of the outsole; and,

FIG. 5 is a perspective view thereof from the rear of the outsole.

The regions of the outsole other than the three ridges form no part of the claimed design and are for illustrative purposes only.