The ornamental design for footwear, as shown and described.
FIG. 1 is a front perspective view of a shoe showing my footwear 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;
FIG. 6 is a top view of the footwear shown in FIG. 1; and,
FIG. 7 is a bottom view of the footwear shown in FIG. 1.
The broken line showing of the sole is for illustrative purposes only and forms no part of the claimed design. The dotted lines other than those representing the sole are understood to represent stitching.