The ornamental design for a mattressspacerpad, as shown and described.
FIG. 1 is a perspective view of the mattress spacer pad in accordance with the present design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a side view thereof, both sides being identical in view;
FIG. 5 is a front view thereof, the rear view being identical; and,
FIG. 6 is a side view thereof with the view including an underlying box spring and overlying mattress, both shown in broken line for environmental purposes.
The broken lines shown in the figure drawings are included for the purpose of illustrating environmental subject matter in FIG. 6 and unclaimed portions of the mattress spacer pad and form no part of the claimed design.