The ornamental design for a supportstrap, as shown and described.
FIG. 1 is a perspective view showing the design in one environment, secured below the knee of a wearer;
FIG. 2 is a top plan view showing the design;
FIG. 3 is a bottom plan view showing the design;
FIG. 4 is a front elevational view showing the design;
FIG. 5 is a rear elevational view showing the design;
FIG. 6 is a right elevational view showing the design;
FIG. 7 is a left elevational view showing the design; and,
FIG. 8 is a perspective view showing the design.
The evenly dashed broken lines in FIG. 1 showing a human leg are for the purpose of illustrating environment that forms no part of the claim. The evenly dashed broken lines shown on the article are for the purpose of illustrating portions of a support strap that form no part of the claim. The zig zag shaped broken lines on the article are for the purpose of illustrating stitching that forms no part of the claim.
The support strap is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claim.