20 Best One
One-piece swimsuits have been making a strong comeback with new stylish designs that flatter many different body types. The right one-piece swimsuit can help you feel your best, regardless if you’re looking for a style with cutouts, slimming panels, or to suit a large bust. A good suit should be durable, last multiple seasons and it should stand up to chlorine or seawater. That’s a pretty tall order for a garment that’s often used one or two seasons a year: and that’s where the Good Housekeeping Institute Textiles Lab comes in.

Our fiber scientists regularly test all types of swimsuits from slimming styles to bathing suits for large busts and everything in between. We test the durability of swimwear by evaluating how well it holds up to being washed, if it keeps its shape after being stretched out, and if it holds up to abrasion which mimics the fabric rubbing against rough surfaces like the concrete edge of a pool. We also look at how well the fabric holds up against color fading from things like UV light, chlorine, seawater, and washing.

Below are our picks from brands that performed well in our tests, our personal scientist and editor favorites or those that are highly rated and reviewed. Here are the best one-piece swimsuits:

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1 Best Overall One-Piece Swimsuit

Oceanus One-Piece Swimsuit This swimsuit aced our tests for holding up to seawater, UV light, chlorine and sweat. Not only is it durable, but testers also rated this suit as having more slimming power than others we tested, saying it minimized their stomach and liked the lift the built-in underwire provided. It also comes in a variety of fun colors and prints.

* Minimizes waist
* Holds up to seawater, UV light, sweat and chlorine

* Pricier than other swimsuits

2 Best Value One-Piece Swimsuit

High Neck One-Piece Swimsuit This high-neck one piece is just as flattering as it is stylish. Our team of experts were impressed when we reviewed it and it has over 17,000 reviews with a 4.5 rating on Amazon. It’s not the absolute best quality swimsuit out there, but it’s hard to beat the price for what you get.

3 Best One-Piece Swimsuit for Long Torso

The Long Torso Sidestroke Summersalt is a favorite brand among our editors and theSidestroke bathing suitishighly rated because it looks flattering on just about anyone, garnering a 5-star rating from 3,400 reviews. We haven’t tested this swimsuit in our Labs, but shoppers love that this looks stylish and has a great fit thanks to the extra length for long torsos. One thing to be aware of, reviewers say it could use some lining or cups for modesty when you’re cold.

* Available in long torso fit
* Flattering fit

* Needs more lining for modesty

4 Best Swimsuit for Tummy Control

Slender Wrap One-Piece Swimsuit Land’s End swimsuits took a top spot for being the most flattering in past tests and although we didn’t test this particular suit, the crisscross shirring adds a stylish detail and a waist slimming effect. The fabric offers sun protection with UPF 50+ and resists breaking down from UV rays, chlorine, sweat and sunscreen.

* Flattering silhouette
* UPF 50+

* Only comes in three colors

5 Best One-Piece Swimsuit with Underwire

Anya Balconnet One-Piece Swimsuit Panache is a brand that performs consistently well in oursports brastests and makes swimsuits that are specifically designed for larger busts. Sizing starts at D-cups and goes up to J-cups.While we haven’t put this particular swimsuit through the battery of Lab tests, reviewers agree with our sports bra findings and say this bathing suit is extremely supportive giving it a 4-star rating. It also has adjustable straps for a customized fit.

* Sizes are by bra size
* Adjustable straps for customized fit

6 Best Full Coverage One-Piece Swimsuit

Mila Long Sleeve One-Piece Swimsuit These UPF 50+ swimsuits are a favorite among our editors and scientists and the Mila bathing suit has long sleeves so it offers maximum protection from the sun. It has a full zip in front for easy on and off and thumbholes to keep the sleeves in place. It also has a built-in shelf bra with removable cups for additional shaping and support.

* UPF 50+ fabric
* Long sleeves for arm sun protection

7 Best Cheeky One-Piece Swimsuit

The Amalfi One Piece Swimsuit The Amalfi swimsuit has become instagram famous over the last few years. It has a sleek and minimalist look and is loved by nearly 1,600 reviewers with a score of 4.6 on its website. We didn’t put this to the test in our Lab, but loyalists of this suit say that the fit is excellent and it doesn’t ride up.It’s also available in different bottom coverage options like the “cheeky” fit.

* Excellent fit
* Doesn’t ride up
* Available in different bottom coverage options

* Style may be too simple for some

8 Most Unique One-Piece Swimsuit

Entwined One-Piece Swimsuit Athleta consistently impresses us in our tests for athletic items like sports bras and workout leggings.While we didn’t put this through the usual Lab rigor,this swimsuit is stylish and functional like the workout clothing from this brand. It has UPF 50+ rated fabric, a shelf bra for support and dries quickly.

9 Most Trendy One-Piece Swimsuit

Wrap One-Piece Swimsuit This popular one-piece swimsuit has nearly 500 reviews and a 4.4 rating and it’s easy to see why. It has a stylish wrap detail that shows a hint of stomach. Reviewers love that it hugs all the right places while still being comfortable. It comes in black or olive colors, has adjustable straps and removable cups.

* Stylish wrap detail
* Flattering fit

10 Best Black One-Piece Swimsuit

Rib Asym One-Piece Swimsuit This asymmetrical swimsuit is stylish enough to double as a top when worn with shorts. You don’t have to worry about the shoulder strap falling down since there are two additional straps in the back to keep it in place. It’s fashionable, has UPF 50+ sun protection and according to Athleta has ultra-resilient fabric that doesn’t bag and lasts five to ten times longer, though we haven’t tested this ourselves in the Lab. However, Athleta is a top performer in many of our tests such as sports bras, so we would expect this to be just as good.

* Stylish design
* Shoulder strap stays in place

11 Best High-Cut One-Piece Swimsuit

Color Block One-Piece Swimsuit Make a fashion statement with this color block bathing suit that also has a side tie. It has over 2,600 reviews with a 4-star rating thanks to the waist-defining color blocking according to reviewers. It also has a shelf bra with removable padding and comes in 13 different colorways. The one drawback, you may need to size up if you have a long torso.

* Flattering color blocking

* May need to size up for long torso

12 Best One-Piece Swimsuit for Large Busts

Vintage One-Piece Swimsuit This retro-inspired swim dress offers extra coverage without drowning you in fabric. Over 14,000 Amazon reviewers gave this bathing suit 4.6 stars saying that they love its flattering fit. The halter straps are adjustable and it has a wide variety of sizes from small to 6X-Large.

* Flattering Fit
* Sizes small to 6X-Large

13 Best Plus-Size One-Piece Swimsuit

Slimming One-Piece Swimsuit This slimming swimsuit is one of L.L. Bean’s top sellers and it comes in hard-to-find fits like long and plus sizes as well as regular. It’s rated UPF 50+ and resists damage from the sun and chlorine. While we didn’t test this in the Lab ourselves, customers of this suit say that it’s elegant, comfortable, and great for swimming laps or lounging by the pool.

* Comes in regular, long, and plus sizes
* Built-in tummy control panel

14 Best Smoothing One-Piece Swimsuit

Island Goddess One-Piece Swimsuit La Blanca

This swimsuit is simple yet flattering with its side ruching detail to smooth the waist. Nearly 400 shoppers gave this bathing suit a 4.5 star rating, saying this suit makes them feel confident. Multiple reviewers that state they have bigger busts also commented they felt this suit was supportive and liked the way it looked on them.

* Good for larger busts
* Supportive

15 Best One-Piece Swimsuit with Shorts

Sport One-Piece Swimsuit with Shorts Often if you want to wear bathing suit shorts a tankini or bikini are the only options, but this one-piece swimsuit has shorts built-in. It has a racerback, making it a good choice for water sport activities since the straps will not fall down. It has a rating of 4.3 stars from over 3,800 reviews with many customers saying they love that it stays in place and it’s a great price.

* Shorts offer more coverage
* Budget friendly

16 Best One-Piece Swimsuit for Swimming Laps

Powerflex Ultraback One-Piece Swimsuit When you think of seriously swimming laps, Speedo is probably one of the first brands that comes to mind as it’s a go-to for athletes. This bathing suit has a racerback so the straps won’t fall down as you swim and also has a built-in shelf-bra for support. We didn’t put this bathing suit to the test in the Lab but nearly 1,000 reviewers gave this a 4.3 stars and love that this suit holds them in while still allowing movement.

* Runs small and may want to size up

17 Most Colorful One-Piece Swimsuit

Crisscross Back One-Piece Swimsuit American Trends amazon.com

Don’t let the low price of this swimsuit fool you, it has a 4.4 rating and over 1,700 reviews on Amazon. It has a built-in bra for support and wide straps with a crisscross back that’s stylish and functional preventing the straps from falling down. As a bonus, it comes in 26 prints and colors. Take note, some reviewers comment this suit runs small so you may want to size up.

* Budget-friendly
* Comes in lots of colors and prints

* Runs small, may want to size up

18 Best Strapless One-Piece Swimsuit

Ruched Bandeau One-Piece Swimsuit Skip the strap tan lines with this strapless bandeau swimsuit from J. Crew. It’s one of the most highly rated swimsuits at J. Crew with almost 250 reviews and a near 5-star rating. Reviewers say that this bathing suit is classy and slimming thanks to the side ruching. It comes in 9 different colors and has a removable halter strap.

* Won’t leave strap tan lines
* Flattering fit

19 Best Ruffle One-Piece Swimsuit

One Shoulder Ruffle One-Piece Swimsuit Some one-piece swimsuits can be a little boring, but this one-shoulder ruffle suit is anything but bland. Over 7,000 reviewers gave this suit a 4.6 rating and can’t stop raving about the complimentary ruching and fun ruffle. It comes in 43 colors and patterns so you’ll be sure to find one you love, but reviewers state you may want to size up.

* Stylish ruffle
* Flattering fit

20 Best Square-Neck One-Piece Swimsuit

Square-Neck One-Piece Swimsuit If you’re in the market for a budget-friendly swimsuit, check out this bathing suit from Old Navy. It has a unique square neckline that shoppers say is very flattering. We didn’t get to test this swimsuit in our Lab but it has nearly 300 reviewers and a 4.5-star rating for its luxury feel and cute design. It comes in black or leopard print but take note, some reviewers with long torsos say this does not fit them well.

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* Unique square neckline

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