The ornamental design for a set of suspensionstraps, as shown and described.
FIG. 1 is a perspective view of a set of suspension straps, in accordance with the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a is a side view thereof;
FIG. 5 is a corresponding side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is an underside view thereof.
In the drawings, the broken lines showing portions of a set of suspension straps depict environment and form no part of the claim. With regard to the interior of the circular elements of the claim illustrated in FIGS. 1 and 7, the claim is limited to the shaded surfaces only for said circular elements.