The ornamental design for footwear, as shown and described.
FIG. 1 is a front perspective view of a footwear showing my new design;
FIG. 2 is a left side view of the footwear shown in FIG. 1;
FIG. 3 is a right 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, sole, portions of the footbed, portions of the straps, portions of the upper, buckle, and buckle holes in the drawings shows unclaimed subject matter.