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One Piece Swimsuits

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Front view of the Baku Rococco High Neck One Piece in Jungle green, with ladder lace detail and soft shaping, available at The Foundation.
 
Front view of the Baku Rococco High Neck One Piece in Jungle green, with ladder lace detail and soft shaping, available at The Foundation.
Side pose of the Jungle Rococco High Neck Swimsuit by Baku, showing curve-enhancing fit and high neckline, stocked by The Foundation.
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Front view of Baku Rococco E–F One Piece Swimsuit in Olive, featuring ladder lace and structured bust support, available at The Foundation.
 
Front view of Baku Rococco E–F One Piece Swimsuit in Olive, featuring ladder lace and structured bust support, available at The Foundation.
Side view of the Rococco E–F Olive One Piece by Baku, showing curve contouring and tummy control, stocked by The Foundation.
Save up to 50%
Front view of the Baku Rococco D–E Ring Front One Piece Swimsuit in bold Shamrock green, with tummy control and luxe support, available at The Foundation.
Front view of the Baku Rococco D–E Ring Front One Piece Swimsuit in bold Shamrock green, with tummy control and luxe support, available at The Foundation.
Save up to 50%
Front view of the Baku Rococco D–E Ring Front One Piece Swimsuit in olive, featuring tummy ruching and bust support, available at The Foundation.
 
Front view of the Baku Rococco D–E Ring Front One Piece Swimsuit in olive, featuring tummy ruching and bust support, available at The Foundation.
Side profile of the olive Baku Rococco One Piece with gathered ruching and tortoise shell ring, stocked at The Foundation.
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ECO High Neck One Piece Black
ECO High Neck One Piece Black
Save up to 72%
Front view of the Zambia Surfsuit in Mocha with Baku's signature cheetah print panels, from The Foundation – sleek and sun-safe.
 
Front view of the Zambia Surfsuit in Mocha with Baku's signature cheetah print panels, from The Foundation – sleek and sun-safe.
Side profile of the Zambia Surfsuit Mocha by Baku, showing contrast panel design and curve-hugging fit, stocked at The Foundation.
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Model wearing Bamboo Grove Underwire Plunge Swimsuit Jet by Fantasie, available at The Foundation, showing bold tropical print and deep V neckline.
 
Model wearing Bamboo Grove Underwire Plunge Swimsuit Jet by Fantasie, available at The Foundation, showing bold tropical print and deep V neckline.
Front view of Bamboo Grove Underwire Plunge Swimsuit Jet by Fantasie, available at The Foundation, tropical one-piece with plunging neckline.
Save up to 69%
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Lake Orta Underwire Twist Front Swimsuit French Navy
Lake Orta Underwire Twist Front Swimsuit French Navy
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Woman wearing the Wildside Cap Sleeve Surf Suit Sage by Baku, front view, at The Foundation—showcasing supportive fit and modern design.
 
Woman wearing the Wildside Cap Sleeve Surf Suit Sage by Baku, front view, at The Foundation—showcasing supportive fit and modern design.
Side profile of the Wildside Cap Sleeve Surf Suit Sage model, featuring Baku’s eco-friendly surf suit, exclusive at The Foundation.
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Cosmopolitan Mesh High Neck One Piece Navy
Cosmopolitan Mesh High Neck One Piece Navy
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Carmelita Avenue Underwire Twist Front Swimsuit Navy
Carmelita Avenue Underwire Twist Front Swimsuit Navy
Save up to 69%
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Ottawa Underwire Twist Front Swimsuit Ink
Ottawa Underwire Twist Front Swimsuit Ink
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DD/E Wave Spliced One Piece Black
DD/E Wave Spliced One Piece Black
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Heritage Classics Sash Surplice One Piece Black
Heritage Classics Sash Surplice One Piece Black
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Heritage Classic Keyhole High Neck One Piece Black
Heritage Classic Keyhole High Neck One Piece Black
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Cosmopolitan DDE Ruch Mesh Frill One Piece Black
Cosmopolitan DDE Ruch Mesh Frill One Piece Black
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Cosmopolitan Mesh High Neck One Piece Black
Cosmopolitan Mesh High Neck One Piece Black
Woman modeling the black POOLPROOF mastectomy scoop one-piece swimsuit with white piping and side gathers.
 
Woman modeling the black POOLPROOF mastectomy scoop one-piece swimsuit with white piping and side gathers.
back view of the black one-piece showing back vee detail and adjustable straps.
Woman wearing POOLPROOF navy mastectomy scoop rouch swimsuit from The Foundation, designed for post-surgery comfort and chlorine resistance.
 
Woman wearing POOLPROOF navy mastectomy scoop rouch swimsuit from The Foundation, designed for post-surgery comfort and chlorine resistance.
Woman wearing POOLPROOF navy mastectomy scoop rouch swimsuit from The Foundation, designed for post-surgery comfort and chlorine resistance. back view
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At The Foundation, we offer a diverse collection of flattering one piece swimsuits to suit every body type and bust size. As expert bra fitters, we know what real support looks and feels like—so we’ve handpicked styles that combine comfort, confidence, and great design.

Whether you prefer sleek zip-front surf suits, classic scoop necks, or one-pieces with built-in bra support, we have you covered. Our brands include trusted names like Baku, Sunseeker, Jantzen, Bond-Eye, Sea Level and Miracle Suit—so you know you're getting quality, shape-enhancing swimwear that lasts.

We also stock SeaSport and surf suits for active days in the sun. If you’re looking for practical, supportive, and stylish swimwear, check out our full range of one piece swimmers—online or in-store at Neutral Bay, Rozelle, or Lin & Barrett in Bowral.

FAQs About One Piece Swimwear

Are one piece swimsuits good for bigger busts?

Yes! Many of our styles offer built-in cup support or underwires. Brands like Sea Level and Jantzen are known for supportive swimwear that caters to fuller busts.

What’s the difference between a regular one piece and a surf suit?

Surf suits often feature zip-fronts, long sleeves and are designed for active water sports. They offer more sun protection and stay put during movement.

Do you have tummy control options?

Absolutely. We stock brands like Miracle Suit that offer shaping technology for a more defined silhouette and enhanced confidence poolside or beachside.

Can I try them on in-store?

Yes! Visit us at The Foundation in Neutral Bay or Rozelle, or Lin & Barrett in Bowral for expert help with fit and style. Our team will help you find the perfect one piece swimsuit for your shape and lifestyle.

What sizes do you carry?

We offer a wide range of inclusive sizes across our one piece swimwear. If you're unsure about fit, we recommend popping in-store for a personalised fitting session.