Underwire Swimsuits

Underwire bra support meets Miratex® shaping in one piece, tankini top, and swim dress silhouettes made to sculpt and support.

Underwire swimsuits give the bust a built-in framework, so the rest of the suit can do its work cleanly. This collection pairs underwire bra construction with Miratex® shaping across one piece, tankini top, and swim dress silhouettes. Choose the neckline and coverage that suit your day: bandeau, sweetheart, V-neck, or high neck, each designed to support fuller busts while the body of the suit smooths, sculpts, and streamlines.

How to choose Underwire swimsuits

Start with the support you want

If bust support is your first decision, begin with the bra construction. Underwire gives the bust a defined foundation, while molded foam cups, soft cups, or bra-sized options refine the fit by silhouette. For a closer cup fit, Bra Sized Swimwear is the clearest path. If you prefer a classic shaping one piece, the Escape One Piece uses a molded foam cup bra with underwire and a sweetheart neckline for supported shaping through the bust.

An african american woman wearing a bandeau swim suit.

Choose the neckline that feels secure

A bandeau shape gives you a clean neckline, especially when removable straps let you adjust the look. The Avanti One Piece is the style to know here, with removable straps on select versions and a sculpted bandeau front that keeps the bust visually lifted. If you want extra hold at the top edge, look to styles such as the Tigre Sombra Avanti One Piece, which has silicone at the neckline for a secure fit. For more shoulder coverage, V-neck and high-neck silhouettes keep the underwire support built in while changing the line at the bust.

Supportive Underwire Swimsuits

Woman wearing a black and white geometric printed one-piece swimsuit with a sweetheart neckline

Match shaping to coverage

Once the bust feels right, choose how much coverage you want through the torso and hip. One piece silhouettes give a continuous sculpted line, tankini tops add two-piece ease, and swim dresses add skirted coverage without stepping away from underwire support. If tummy control or waist shaping is part of your fit checklist, start with Shaping Swimwear and look for details that work where you want them: shirring to slim the sides, draped panels to smooth the midsection, and Miratex® fabric for allover control.

Find your Underwire fit

When bust support is the first thing you look for, start here, then refine by silhouette. Visit Bra Sized Swimwear for cup-focused fit, Shaping Swimwear for Miratex® control, and Shop All Swim when you want the full swim assortment. If a bandeau with removable straps is your fit direction, begin with the Avanti One Piece.

What makes a swimsuit with Underwire supportive?

A swimsuit with underwire gives the bust a built-in structure beneath the cup. In this collection, that support pairs with Miratex® shaping, so the bust feels defined while the body of the suit smooths and sculpts.

Which bathing suits with Underwire are easiest to choose?

Start with the silhouette you like to wear. One piece styles create a continuous sculpted line, tankini tops add two-piece ease, and swim dresses add skirted coverage while keeping underwire support built in.

Do swimsuits with Underwire work for fuller busts?

Yes. This collection is built for shoppers who want underwire support, including fuller bust fit needs. Look for bra-sized options, D, DD, and DDD Cup choices where offered, and neckline details that help you feel secure.

Is a swimsuit with Underwire Bra support comfortable for swimming?

It can be. Choose a secure neckline, supportive straps, and the right cup fit for your bust. One reviewer wrote, "What a stunning, figure flattering bathing suit! It gives support, and I can swim laps. Play water games with my grandchildren, and be comfortable in it, for hours at the beach or pool." (Bonnie G., Siren One Piece, September 2026)

What swimwear with Underwire gives the most coverage?

For more coverage, start with one piece swimsuits and swim dresses. A one piece gives uninterrupted shaping through the torso, while a swim dress adds skirted coverage with underwire support at the bust.