Consider this chic one-piece your LBD in poolside form. With sexy peeks of skin and supportive underwire cups, this suit is guaranteed to turn heads.

Shop it: Agent Provocateur Marnee Belted Swimsuit, $790

The bandeau gets a sophisticated upgrade with a front zipper and a chic, skirted bottom.

Shop it: Michael Kors Tunisia Front Zip Bandea and Skirted Bottom, $152

This sophisticated floral bikini top is designed like an underwire bra for comfort and support, and comes with wide bottoms with delicate lace detailing.

Shop it: Zimmermann Keeper Underwire Bikini, $250

Channel your inner Bond girl with a black, belted halter top and bottoms with matching buckles.

Shop it: Michael Kors Belted Halter Bikini, $340

"The granny suits of decades past are gone. One look at Elle Macpherson's 50-year-old figure proves that mature women are maintaining their figures, and looking for sexy yet dignified swimsuits that show off the fruits of their workouts and healthy living habits," says Dunn.

Look For: Retro, high-waisted bikini bottoms, sexy one-piece suits that offer support and flatter curves.