The ornamental design for a footcushioning, as shown and described.
FIG. 1 is a top plan view of a foot cushioning showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof; and,
FIG. 6 is a front, top perspective view thereof.
All surfaces not shown form no part of the claimed design.
A foot cushioning device is shown broken away in FIGS. 1 through 3 and in FIG. 6 to indicate indeterminate length, and the rear view is a mirror image of the front elevational view.