The ornamental design for footwear, as shown and described.
FIG. 1 is a top left front perspective view of footwear, showing new design;
FIG. 2 is a top right rear perspective view thereof
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a left front perspective view thereof.
The broken line showing of the boot upper in FIG. 7 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.