The ornamental design for footwear, as shown and described.
FIG. 1 is a front perspective view of footwear showing my new design;
FIG. 2 is a right side view of the footwear shown in FIG. 1;
FIG. 3 is a left side view of the footwear shown in FIG. 1;
FIG. 4 is a front view of the footwear shown in FIG. 1;
FIG. 5 is a rear view of the footwear shown in FIG. 1; and,
FIG. 6 is a top view of the footwear shown in FIG. 1.
The broken line showing of the heel, heel cap, footbed, sole, buckle, buckle holes, strap, and upper in the drawings depicts portions of the footwear that form no part of the claimed design.