The ornamental design for a “suspension relief seat”, as shown and described.
FIG. 1 is a front perspective view of a suspension relief seat for attachment to a support harness for securing a person to an anchor point, showing my new, original and ornamental design, all broken or dash line features shown in FIGS. 1-8 are for illustrative purposes and are not part of the claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view;
FIG. 4 is right side view;
FIG. 5 is a left side view;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view; and,
FIG. 8 is a perspective view of the suspension relief seat attached to the support harness in use, the support harness and the person are shown in broken lines for illustration purposes and are not part of the claimed design.