This strapless bra is not going *anywhere*, to its credit.  There is silicone edging (or whatever that rubbery stuff is) that holds it in place to keep it from drifting down over time.  It is also held strong by these heavy elastic bands from the side of the cups to the back, which I would not have expected to work so well, but they do.  They pull the bra toward the back and help counteract bra-droop, and I think also help smooth out the back line. And COMFORTABLE!!  How did they get all of those features in, with comfort as well??  I'm sold.

Detachable black straps.

This is a very nice strapless bra, light years ahead of anything I've worn before (and those ones were freakin' expensive!).  Very very impressed.