Top 8 Black One Piece Swimsuits
Few pieces work harder in a woman’s wardrobe than the black one piece swimsuit. It's equal parts elegant and essential. Whether you’re after sculpting support, minimal tan lines, or sun-safe coverage, the right one piece balances form, function, and style.
In this guide, we spotlight 8 timeless black one piece swimsuits, each meticulously designed to enhance your shape, elevate your confidence, and fit your lifestyle. From textured fabrics to bustier silhouettes and rashies reimagined as sleek bodysuits, these are the black one pieces worth investing in.
What to Look for in a One Piece Swimsuit
Before diving into our edit, consider the following:
Bust Support that works for you
From subtle shaping to structured lift, support should feel secure and never restrictive. Look for built-in shelf bras, underwire, or panel detailing that provides comfort and confidence across all bust sizes.
Fabric that feels good
Textured crinkle, form-fitting nylon, or buttery-soft stretch fabric. Your choice matters for both comfort and longevity.
The Coverage you want
From cheeky cut or full coverage, high rise to classic leglines, choose what makes you feel most confident.
Lifestyle Fit
Whether you’re lounging poolside, travelling, or swimming laps, your swimsuit should move with you.
The 8 Best Black One Piece Swimsuits to Buy Now
Classic Square Neck One Piece
This one piece is a definition of timeless. Its square neckline elongates the décolletage, while wide straps and excellent coverage provide all day support and security. Fully-lined for a premium, sculpting feel and designed with removable bows for versatile styling.
Best for: All silhouettes
Fabric: Compressive Stretch Fabric
Support: Super supportive and firm fit , fully-lined with panel detailing
Wear it: With a beach shirt dress and a raffia hat for post-swim chic
Shop Classic Square Neck One Piece
"Absolutely love this swimwear, you can tell the designer really understands fit. Swimwear has always been “scary” but Une Piece is a pleasure to wear, and feel uplifted and amazing in." - PENNY T.
Textured Classic Square Neck One Piece
This iteration adds tactile sophistication with its unique textured finish. This one piece is fully lined and features removable bows, perfect for those who like their classics with a twist.
Best for: All silhouettes and those wanting versatility
Fabric: Textured stretch fabric
Support: Internal Panelling
Wear it: With a sarong or a skirt for a chic beach-to-bar look.
Shop Textured Classic Square Neck One Piece
"Beautiful quality bathers, great fit and texture" - SHAREE H.
Crinkle Cut Square Neck One Piece
Ultra-comfortable and endlessly flattering one piece crafted from premium crinkle fabric that gently molds to your shape. With fully adjustable leg height and considered bottom coverage, it’s designed to move with you.
Best for: Women seeking versatility in their swimwear
Fabric: Premium Crinkle Cut Swim Fabric
Support: Superior built-in bust support with removable pads
Wear it: With a raffia hat and layer with a cover up for a complete beach look
Shop Crinkle Cut Square Neck One Piece
" This material is like something I’ve never felt before. I was concerned at how little they looked when I unpacked them, but they fit perfectly & are so supportive. Will definitely buy more 🥰." - BELINDA M.
Classic One Shoulder One Piece
An architectural silhouette that reveals just enough. Designed to have excellent bust support rarely found in one shoulder swimsuits, it’s fully lined for a sculpting fit.
Best for: Women who lean toward fashion-forward silhouettes but still prioritise everyday comfort
Fabric: Soft stretch fabric
Support: Internal shelf bra with removable padded inserts
Wear it: With a beach short and an accessory for a chic poolside look
Shop Classic One Shoulder One Piece
"This swimsuit is so flattering and I love the one shoulder style. True to size. Highly recommend!" - LOUISA C.
Crinkle Cut V-Neck One Piece with Ring
A plunging neckline with a beautiful hardware ring detail. Crafted from premium crinkle fabric that flatters in equal measure. It is fully lined for comfort and confidence, from poolside to resort dinners.
Best for: Women looking for a blend of style and ease
Fabric: Ultra-stretch crinkle
Support: Superior built-in bust support with removable pads
Wear it: With a flattering V Neck Kaftan and a maxi skirt for a chic beach to bar look
Shop Crinkle Cut V-Neck One Piece with Ring
"A very flattering swimsuit that can be molded into a high cut or fuller cover around the bum. Inserts in the bust creates a nice lift, but can be removed if needed. A unique fabric, I wasn’t quite sure about the thickness, but this definitely works to create a supported and fashionable look. The front feature is a nice touch that takes the look from pool to lunch with a wrap or shorts over top. This is my second UNE purchase and both times I ordered a 10 when I’m usually an 8-10." - ANN H.
Original Bustier Balconette One Piece
Like your favourite lingerie—reinvented for the water. Built-in underwire cups and adjustable straps for a sculpted, all-day support. Wear it two ways: over the shoulders for classic structure, or tied as a halter for a touch of vintage glamour. Fully lined for a smooth, confident fit that flatters with intention.
Best for: Women seeking extra bust support
Fabric: Supportive Stretch Fabric
Support: Excellent support featuring underwire, internal shelf bra with adjustable straps and removable pads
Wear it: With a matchy sweetheart neckline dress and a sun hat for an oh so chic ensemble.
Shop Original Bustier Balconette One Piece
"The best swimwear I’ve ever bought. I’d been considering this piece for over a year. My only regret is not buying it sooner. The fit is very flattering and classic style. I’ll be wearing in years to come." - ALLISON M.
Classic Strapless One Piece
Clean, sculpted, and endlessly versatile. This one piece features a sleek, silicone-gripped neckline that stays comfortably in place. Designed to be worn four ways with its removable straps: go fully strapless, wear over the shoulders for added support, tie into feminine bows, or style as a halter for a touch of retro polish. Fully lined for a smooth, confident fit that transitions seamlessly from sun to styled.
Best for:Women who love versatile styling without compromising on comfort
Fabric: Soft Stretch Fabric
Support: Excellent bust support featuring shelf bra, grip tape and panel detailing with removable padded inserts
Wear it: With flowy pants and a beach shirt dress for days spent relaxing by the beach.
Shop Classic Strapless One Piece
"I absolutely love my bathers from Une Piece. The fit is incredibly flattering and supportive without feeling restrictive, and the quality is outstanding. The fabric feels thick, soft, and secure, with just the right amount of stretch. It feels comfortable and confidence-boosting. I also love that it’s practical enough for swimming and chasing kids at the beach, but stylish enough to feel polished and put together with its mulitple designs Highly recommend Une Piece for anyone looking for bathers that are both beautiful and functional." - VIV M.
Original Sexie Rashie
Part-rashie, part-bodycon one piece. Zip it up for full coverage or unzip slightly for a sophisticated plunge. Beautifully crafted long sleeve with sustainable UPF50+ fabric for maximum sun protection.
Best for: Active beach days, surfing, or sun-sensitive skin
Fabric: Quick-dry performance fabric
Support: Super supportive fit with waist panelling details and internal shelf bra with removable pads
Wear it: With a cap and a beach pant for a comfortable, all-day look
"I don’t look anywhere else for my swimwear. I need extra protection when out beaching and swimming with the grandkids and this rashie fits the bill perfectly. - VICKY F."
The black one piece is the sartorial equivalent of a white shirt or a trench coat. It never feels overdone, yet always looks considered. It travels well, wears effortlessly, and transcends seasons and trends.
From sculpting bustiers to sun-safe rashies, there’s a UNE PIECE for every body, every moment.
Why UNE PIECE Black One Pieces Feel Different
Crafted for the woman who swims, sunbathes, and surfs, UNE PIECE one pieces are designed in Australia with a singular mission: to build confidence and combine elegance with comfort.
Each silhouette is engineered for real life and not just resort moments.
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Made from premium recycled fabrics that feel as good as they perform
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Fully lined for comfort, confidence, and full opacity, either wet or dry
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Built-in invisible support sculpts and lifts without compromising style
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Chlorine- and fade-resistant to stay rich and true, season after season
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Thoughtful design details like removable bows and hardware rings to functional zippers that add a refined touch of versatility and individuality to each silhouette.
The result? Swimwear that feels tailored to your life. Intentionally designed to support, flatter, and empower every woman.
FAQs
What makes UNE PIECE one piece swimsuits different from other brands?
UNE PIECE swimwear is designed in Australia using premium, recycled fabrics that sculpt, support, and last. Each suit is fully lined for comfort and opacity, with excellent design details that blend fashion with function.
Which swimsuits are best for sun protection?
Choose high-coverage styles like the Original Sexie Rashie, which offers UPF50+ and long sleeves.
Is the fabric comfortable for all-day wear?
Yes. UNE PIECE uses high-quality stretch fabrics that mold to every body. Every piece is fully lined for a smooth, second-skin feel.
Do UNE PIECE swimsuits fade or sag over time?
No. Crafted with premium, chlorine-resistant fabrics, UNE PIECE swimwear is designed to hold its shape and colour, swim after swim.
Are there any strapless options that still offer support?
Yes, the Classic Strapless One Piece is designed with a silicone grip and internal shelf bra, offering structure and hold without slipping. Plus, it comes with removable straps so you can wear it four ways.
Which swimwear can be worn in multiple ways?
Several UNE PIECE swimsuits are thoughtfully designed for versatile styling. The Classic Strapless One Piece can be worn four ways — strapless, with straps over the shoulders, tied as feminine bows, or styled as a halter — making it ideal for women who want both elegance and adaptability. The Original Bustier Balconette One Piece offers two styling options: wear the straps over the shoulders for classic support or tie them as a halter for a retro-inspired look. The Original Sexie Rashie features a functional front zip that allows you to wear it fully closed for sun-safe coverage, or unzipped slightly to create a sophisticated plunge. Each piece is crafted to move with you — from poolside to post-swim styling.