Cushioning device for footwear

FIG. 1 is a front top perspective view of a cushioning device for footwear showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a rear view thereof.

The broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The broken lines depicting the remainder of the cushioning device for footwear form no part of the claimed design.