The ornamental design for a straplessbra, as shown and described.
FIG. 1 is a rear perspective view of an embodiment of a strapless bra, shown with the body band in an unfastened condition;
FIG. 2 is a rear perspective of the strapless bra of FIG. 1, shown with the body band in a fastened condition; and,
FIG. 3 is rear perspective view of the strapless bra of FIGS. 1-2, shown in a fastened condition while in a state of use.
The portions of the brassiere shown in broken lines illustrate environmental subject matter that forms no part of the claimed design. The partial human figure shown in broken lines in FIG. 3 illustrates environmental subject matter included to assist in showing how the claimed design may appear when worn and forms no part of the claimed design.