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One Piece Swimsuits

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Prism Minimal Surplice One Piece - Black
Prism Minimal Surplice One Piece - Black
Save up to 68%

Prism Minimal Surplice One Piece - Black

$50.00 $159.95
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Sunset High Neck Mast One Piece - White
Sunset High Neck Mast One Piece - White
Save up to 68%

Sunset High Neck Mast One Piece - White

$50.00 $159.95
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Rococco D-E Ring One Piece Palm

$184.95
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Rococco D-E Ring One Piece Nero
Rococco D-E Ring One Piece Nero

Rococco D-E Ring One Piece Nero

$184.95
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Klimt One Piece Black
Klimt One Piece Black
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Klimt One Piece Black

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Chantique Hayes Underwire One Piece
Chantique Hayes Underwire One Piece
Save up to 50%

Chantique Hayes Underwire One Piece

$82.47 $164.95
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Cosmopolitan DDE Ruch Mesh Frill One Piece Navy
Cosmopolitan DDE Ruch Mesh Frill One Piece Navy
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Cosmopolitan DDE Ruch Mesh Frill One Piece Navy

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Model wearing the Empreinte Cosmic V-Neck One Piece swimsuit in Lichen green with gold strap detail and flattering neckline.
 
Model wearing the Empreinte Cosmic V-Neck One Piece swimsuit in Lichen green with gold strap detail and flattering neckline.
Front view of Model showcasing full fit of the Cosmic V-Neck swimsuit in earthy Lichen, with smooth shaping and elegant silhouette.
Save up to 50%

Cosmic V-Neck Non Wire D-E Cup One Piece Lichen

$124.97 $249.95
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Network Madero Underwire Shaping Swimsuit Midnight Blue
Network Madero Underwire Shaping Swimsuit Midnight Blue

Network Madero Underwire Shaping Swimsuit Midnight Blue

$319.00
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Network Mystique Underwire Shaping Swimsuit Black
Network Mystique Underwire Shaping Swimsuit Black

Network Mystique Underwire Shaping Swimsuit Black

$319.00
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Palms Splice Mastectomy One Piece Arctic
Palms Splice Mastectomy One Piece Arctic

Palms Splice Mastectomy One Piece Arctic

$129.95
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Palms E/F Vee One Piece Arctic
Palms E/F Vee One Piece Arctic

Palms E/F Vee One Piece Arctic

$129.95
Front view of the Palms Sheath One Piece Swimsuit in Arctic palm print by Poolproof, featuring soft cups and crossover neckline, available at The Foundation.
 
Front view of the Palms Sheath One Piece Swimsuit in Arctic palm print by Poolproof, featuring soft cups and crossover neckline, available at The Foundation.
Back view of Poolproof Palms Sheath One Piece in Arctic, showing shelf bra support and Aquashield® fabric, sold at The Foundation.

Palms Sheath One Piece Arctic

$129.95
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Saltbeach Scoop Ruche Mast One Piece Navy
Saltbeach Scoop Ruche Mast One Piece Navy
Save up to 50%

Saltbeach Scoop Ruche Mast One Piece Navy

$64.97 $129.95
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Saltbeach E/F Vee One Piece Navy
Saltbeach E/F Vee One Piece Navy
Save up to 50%

Saltbeach E/F Vee One Piece Navy

$64.97 $129.95
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Saltbeach DD/E Wave Spliced One Piece Navy
Saltbeach DD/E Wave Spliced One Piece Navy
Save up to 50%

Saltbeach DD/E Wave Spliced One Piece Navy

$64.97 $129.95
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Stardust Pintuck Mastectomy One Piece Black
Stardust Pintuck Mastectomy One Piece Black
Save up to 50%

Stardust Pintuck Mastectomy One Piece Black

$64.97 $129.95
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Essentials Short Sleeve Multifit Surfsuit Night Sky
Essentials Short Sleeve Multifit Surfsuit Night Sky
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Essentials Short Sleeve Multifit Surfsuit Night Sky

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Essentials Twist Front Multifit One Piece Cobalt
Essentials Twist Front Multifit One Piece Cobalt

Essentials Twist Front Multifit One Piece Cobalt

$109.95
Front view of Baku Rococco High Neck One Piece Swimsuit in Nero black, with subtle ladder lace and sleek shaping, available at The Foundation.
Full-length model in Baku’s Rococco High Neck One Piece in Nero, showcasing supportive design and elegant silhouette, sold at The Foundation.
Front view of Baku Rococco High Neck One Piece Swimsuit in Nero black, with subtle ladder lace and sleek shaping, available at The Foundation.
Full-length model in Baku’s Rococco High Neck One Piece in Nero, showcasing supportive design and elegant silhouette, sold at The Foundation.

Rococco High Neck One Piece Nero

$209.95
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%

Rococco E-F One Piece Olive

$104.97 $209.95
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%

Rococco D-E Ring Front One Piece Shamrock

$89.97 $179.95
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ECO High Neck One Piece Black
ECO High Neck One Piece Black
Save up to 72%

ECO High Neck One Piece Black

$50.00 $184.95
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%

Bamboo Grove Underwire Plunge Swimsuit Jet

$50.00 $164.95

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.