The ornamental design for footwear, as shown and described.
FIG. 1 is a front perspective view of footwear showing my 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 portion of sole, buckle, buckle holes, strap, portion of strap, heel, heel cap and back portion of footbed is for illustrative purposes only and forms no part of the claimed design.