The ornamental design for a sagging cushionrestorationdevice, as shown and described.
FIG. 1 is a perspective view of a sofa restoration pad showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a left side elevational view thereof, the right side being a mirror image;
FIG. 4 is a front side elevational view thereof, the rear side being a minor image;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a top perspective view of a sofa restoration pad partly inserted into a sofa cushion.
The broken line showing of a sofa cushion and couch in FIG. 6 is included for the purpose of showing environmental structure and forms no part of the claimed design.