One Piece Swimwear

Our popular one piece swimsuits form the foundation of any vacation wardrobe. Sea Level's signature collection of styles combine athletic lines with innovative paneling and contemporary details to leave you feeling sculpted, supported and confident. 

Designed in Australia since 2018, we believe in enhancing a woman’s body, using the most innovative technology to create a wide selection of flattering and sculpting designs – our essential one piece swimwear is timeless, made from the highest quality fabrics, combining elegant lines with clever contemporary details to match any mood. Our curated collection of one-piece swimwear also proudly offers an extensive range of fit and cup size options, from A to G cup fits and inclusive sizing from US 4 to 16.

One Piece Eco-Friendly Fabrics

Our swimsuits are made from advanced eco-friendly fabrics that use regenerated nylon yarns derived from pre-consumer waste. We use advanced technology so not only do these recycled textiles maintain a durable soft feel and premium high-quality one-piece swimsuit finish, they also provide UPF 50+ sun protection. 

Our Favorite One Piece Styles

Our one piece swimwear also utilizes precision contouring and is available in a full offering of sizes, each style is expertly designed to enhance the body with ultimate support and comfort. Here, you can select from some of our most popular US beach one piece styles, to find the one that complements your style and preference:

Cross Front One Pieces

Our cross front one piece styles incorporate sculpting technology via 360° Powermesh paneling at the front and back of the body, and all are available in a full range of cup sizes including D and DD cups. 

Longline One Pieces

Longline one pieces offer a twist on the classic one piece. With an elongated torso and extended body coverage, our longline one pieces are designed to be flattering on all body types.

Bandeau One Pieces

Our bandeau one piece features a detachable strapless neckline that highlights the shoulders and collarbones. This style offers a more minimalist look, making them perfect for sunbathing with no tan lines. Whether you are lounging poolside or styling it with a wide-leg pant for a beach-to-bar moment, the bandeau one piece is a timeless choice. 

One Piece Colors & Prints

From timeless monochromes like our black one piece swimsuits to our eye-catching prints, we offer an extensive color palette. Classic black one pieces offer a slimming look that will never go out of style. Soft pastels and earthy tones bring a gentle, beachy vibe for summers spent by the pool. If you want to stand out at the beach, we have tropical florals, retro stripes and animal prints. Whether you find yourself drawn to minimalist designs or love making a statement, we have something for everyone.

Styling Your One Piece from Sea Level

Styling a one piece goes beyond the beach, our one pieces transition from swim to street. For a post-swim look, throw on a linen button-up shirt and high-waisted shorts or a stylish sarong. Our one pieces look great styled with a flowing maxi skirt and strappy sandals for that perfect coastal getaway vibe . One pieces are a great foundation for a range of outfits and the best part is they don’t take up much room in your suitcase at all!

Discover Timeless Swimwear

Shopping online is easy. Explore our new arrivals page to find out more on the latest trends in swimwear and new collection pieces, or dive into our one piece line-up to discover our collection of classic looks you can mix and match. For any fit or sizing enquiries, please contact our dedicated customer service consultants, who can help you find the ultimate shapes to suit your style.

You can always shop now, pay later with Afterpay, or give the gift of choice with a Sea Level gift card and share the ultimate flattering swimwear brand with a loved one, and enjoy free shipping on all your Sea Level Swim purchases over $150. 

Women’s One Piece Swimwear FAQs

Can I wear a one piece as a bodysuit?

Yes! Our one pieces double up as bodysuits and can be layered under flowy pants or maxi skirts on vacation, which is a great way to save space in your suitcase when travelling. Heading straight to the lunch after the beach? Throw a skirt over your one piece and you’re ready to go.

Do one pieces offer enough support for a larger bust?

With features like underwire, side boning, built-in cups, adjustable and convertible straps and higher necklines for added support, our one piece range has a wide selection of swimsuits suitable for larger bust sizes. If you are looking to shop swimsuits with a larger cup size exclusively, shop our swimwear ranges by cup size like our D Cup swimwear and E Cup swimwear collections.

Are one piece swimsuits flattering for all body types?

At Sea Level, our one pieces come in a wide range of cuts and styles, from high-leg styles and plunging necklines to longline silhouettes. Highlight your curves, add support or achieve a sleek shape at the beach or the by pool with our one piece bathers collection.