The answer, as with so many things, is money. Any bra that’s going to do its considerable job and still look feminine, attractive, young, is going to set you back at least as much as you just spent on sneakers for your teenager. You’re going to have to go to a fancy lingerie department to buy it, and even be fitted by a trained professional brandishing a tape measure. (BTW, for those of you who don’t know, that’s John Currin’s wonderful painting The Bra Shop above left.)
Let’s just quickly run over the elements your bra can NOT have. No elastic thick and strong enough to support a bungee jumper. No more than two — or in extreme cases, three — hooks in back. No cups so capacious they totally rule out the possibility of cleavage. No quadriboob; no backfat.
At the same time, your bra needs to lift, separate, streamline, steady, and smooth. Impossible? No. Expensive but worth it: absolutely.