When Did We All Agree to Be This Exposed at the Pool? A Slightly Unhinged History of the Bikini
There is a version of you that will wear a full outfit to walk from the car to the pool: Cover-up. Sunglasses. Sandals. Possibly a hat with an attitude.
Then you walk through the gate and take almost all of it off, down to what is basically your bra & panties. In front of your family, neighbors, Your kid's swim teacher, even some random guy who is grilling. Strangers & acquaintances all have a first row seat to your ass-ets.
And for the most part, nobody finds this strange. It is one of the most normalized things we do.
We're not here to tell you it's wrong. Genuinely, if you’re comfortable with it wear the bikini, live your life! We're just endlessly curious about how the rule got made, because the more you read, the clearer it gets: nobody voted on this. It was decided by a handful of people, most of them men, some of them selling something, one of them naming a garment after a nuclear weapons test.
Let's get into it.
Part 1: The Romans did it first, obviously
Long before Paris, there's a floor mosaic in a Sicilian villa (the Villa Romana del Casale, roughly 4th century AD) showing women in what is unmistakably a two-piece. Bandeau top, briefs, one of them holding what looks like a gym prop. Archaeologists nicknamed them the "Bikini Girls."
So the two-piece isn't a 20th-century invention. It's a comeback. Which means at some point between the Romans and us, someone hard-launched the idea that this was scandalous, and everyone just went with it.
Part 2: The century where swimming was fully clothed
By the 1800s, women were being wheeled into the sea inside bathing machines which were legit wooden huts on wheels, so nobody could see you enter the water. You changed inside, got rolled into the surf, and emerged in a wool bathing costume with sleeves, a skirt, and sometimes weights sewn into the hem so the fabric wouldn't float up and betray you.
Wet wool. Weighted hems. In the ocean. Girls were drowning-adjacent out of politeness.
Then in 1907, Australian swimmer Annette Kellerman was reportedly arrested on a Boston beach for wearing a one-piece that showed her arms and legs. A one-piece. With her limbs out. That was the crime.
For decades after, some American beaches employed inspectors with tape measures to check how much thigh was showing. There are photographs. Men in hats, kneeling on the sand, measuring women's legs. Professionally.
And here's the part everyone forgets: men were policed too. Men were being fined for going topless at the beach into the 1930s. A bare male chest was a public indecency issue until roughly 1936.
That's the whole point. The line moved. It moves constantly. It was never a law of physics: it was a mood, enforced with a tape measure.
THE BOMB + THE SONG
Two French designers were racing each other to the smallest swimsuit.
Jacques Heim released the "Atome" in Cannes marketed as "the world's smallest bathing suit."
Weeks later, engineer-turned-designer Louis Réard debuted his version at the Piscine Molitor in Paris on 5 July 1946. His pitch: smaller than the smallest. Four triangles, roughly 30 inches of fabric, held together with string.
He named it the bikini, after Bikini Atoll, where the United States had begun nuclear weapons testing days earlier. That was the marketing concept. The garment was named after a bomb because the reaction was supposed to be an explosion.
And here's the detail that says everything: no professional fashion model in Paris would wear it.Réard couldn't hire anyone. He eventually paid Micheline Bernardini, a 19-year-old dancer from the Casino de Paris, because she was the only person willing to be photographed in it.
The backlash was immediate and international. Banned on beaches in Spain, Portugal, Italy and Belgium. The Vatican declared it sinful. Miss World banned it from the competition in 1952 after the previous year's winner was crowned in one.
So to summarise: the garment that is now the default, the neutral, the thing you feel weird for notwearing, was, within living memory, illegal in four countries and considered a scandal by the Pope.
Nobody voted. It just won.
The song. Let's talk about the song.
In 1960, Brian Hyland released "Itsy Bitsy Teenie Weenie Yellow Polka Dot Bikini." It hit number one in America and became the cultural anthem of the bikini, the sound of the two-piece officially arriving in the mainstream.
Here's the thing almost nobody clocks: that song is not about wearing a bikini. It's about hiding.
Go verse by verse. It's three escalating locations of concealment:
She's in the locker. She won't come out, afraid somebody would see.
She wraps herself in a blanket. She makes it to the beach, and immediately builds a fabric fortress.
She's stuck in the water. She got in and now she can't get out, because getting out means being seen.
The chorus is a crowd standing around going "she's afraid to come out." That's not a bop. That's a hostage situation set to a catchy beat.
The most famous song ever written about the bikini is, start to finish, about a girl having a genuinely bad time. She’s too self-conscious to move, too exposed to leave the water, wrapped in a blanket at the beach.
The songwriter, Paul Vance, said the inspiration was watching his own small daughter in a bathing suit.
We're not going to over-read a novelty single from 1960. But it is extremely unreal that the moment the bikini went fully mainstream, the number one song about it was a girl trying to disappear. Sixty-six years later, women are still standing in the shallow end doing the arithmetic on when to stand up.
If you've ever waited for a lull in the crowd before getting out of a pool: congratulations, you know that song better than you thought & no it has nothing to do with your body confidence.
WHERE WE ARE TODAY
So how did we get here? (And why your one-piece is lying to you)
Fast-forward to today. The bikini won. But here's the part that actually annoys us:
even the "modest option" isn't a good one.
Go look at a rack of one-pieces. Almost all of them are cut like a leotard: high leg openings, a narrow back, bottoms that are let's be honest less fabric than regular underwear. You bought what you thought was coverage, except that what you bought is just a torso panel.
A one-piece isn't a coverage garment. It's a connected two-piece. Somewhere along the line "one-piece" got culturally filed as the modest choice, and the industry has been coasting on that reputation for years while quietly cutting the leg opening higher every season.
Why does it keep happening? Three unglamorous reasons:
1. It's built on a leotard block, not a shorts block. The base patterns the swim industry uses descend from dancewear and gymnastics: one continuous front-to-back panel with high leg openings for hip mobility. Actually covering the seat requires a different pattern: side seams, a real gusset, a drafted rise. That means new blocks, new grading, new fit sessions. Most brands don't do it because prototypes are expensive. So instead they adapt a pattern that already exists.
2. "High leg" is sold as a body-shaping trick. It gets marketed as leg-lengthening. That's an aesthetic argument, not a swimming one. (We don't use that language, ever.)
3. Less fabric is cheaper. It has never stopped being true.
And rear coverage is the tell. A bottom that covers you and stays there through a dive isn't a fabric issue, it's a fit and pattern problem. Elastic engineering, drafted rise, actual wear-testing. Cutting it high and letting the elastic ride where it wants is simply cheaper.
Here's the fact that ends the debate: competitive swimmers wear jammers and kneeskins. The fastest humans in water are the most covered people at the pool. "Less fabric = better performance" was never true. The high leg is aesthetic. The coverage is the functional one.
And then there's the sun. And those UVs…
This is the part where the default gets genuinely hard to defend, and it isn't opinion it's arithmetic.
Fabric is the most reliable sun protection you own.
• UPF 50+ fabric — blocks ~98% of UV. Only about 1/50th passes through.
• SPF 50 sunscreen — measured around ~82% in practice.
• SPF 30 sunscreen — measured around ~54% in practice.
And the kicker: studies consistently find most people apply only a quarter to a half of the amount sunscreen is tested at. Which means your SPF 50 is often behaving like something far weaker. It also sweats off, rinses off, gets missed, and needs reapplying every couple of hours (usually while you're the one reapplying it on everybody else too).
Fabric doesn't have an application error rate. It doesn't need reapplying. It just works, all afternoon, without you thinking about it.
There's an uncomfortable geography to this too. Published research on melanoma consistently finds the lower extremities are the most common site in women, around 42% legs versus roughly 25% trunk, and recent population-level work has flagged melanoma in situ rising on the legs and trunk in women specifically.
Legs. The thing modern swimwear covers least.
(To be clear: we make swimwear, not medical claims. UPF fabric reduces UV exposure, that's the whole claim.)
Today, tomorrow & why we’re genuinely so excited for the future of Swim
Not Naked Swim, is the version no one was making, the non-standard option that exists because our co-founder Morgan voiced what most of us have been feeling: "I just want to feel… not naked." Not hidden. Not covered in shame. Just not spending the entire afternoon aware of exactly how much of our bodies are exposed.
But, and this is the important part, coverage on its own isn't the answer. Because everything we told you earlier is true: more fabric can mean heavier, colder, slower-drying, more chafing. That's the real reason coverage lost. Nobody solved the wet-fabric problem, so the industry just shrank the garment instead.
So we designed layers intertionally. Every piece is a decision:
The Run This Town skort. In prototyping this thing had multiple layers of fabric. It looked right and felt awful! It held water, it hung heavy, it took forever to dry. So we rebuilt it: a mesh overlay skirt over the base. Same silhouette, same coverage, but water runs straight through and it dries fast. You get the skirt without carrying half the pool home in it.
The New Rules top. Double-lined for real support and real opacity, no thin-fabric anxiety, no holding yourself when you jump. But the lining is engineered with mesh, so it isn't two solid layers of soaked fabric sitting against you for three hours. Support and coverage, without the wet-clothes feeling.
Across the whole line: recycled nylon with built-in UV protection, so the coverage is doing sun work at the same time. Cut and sewn in the USA. Shipped in ocean-waste recycled polymailers. Built to last multiple seasons, because a suit you wear for years is worth far more to the planet than a new one every season.
We thought of it. That's genuinely the whole pitch. Every irritating little thing you've put up with in swimwear from the wet cling & the ride-up, to the coverage that isn't coverage.
And we're not done. We're introducing more styles built on exactly the same principles: real coverage, engineered dry-time, built-in UV protection, US-made, and cut so you never have to plan your exit from the water
The point
The bikini was invented by a man who named it after a bomb, modelled by the only woman in Paris who'd agree to wear it, and made famous by a song about a girl too anxious to leave the locker room. Then the "modest alternative" turned out to be the same garment with the sides sewn shut.
We're pro-bikini, truly. This isn't a "kids these days" blog and we're not handing out modesty scores, nobody needs that, least of all from a swimwear brand.
We just think you should get to choose. And that the covered option should be the well-designed one, not the consolation prize.
Eighty years later, you get to pick. That's the upgrade.
Now we want the real answer: what's the one thing you'd change about every swimsuit you've ever owned? Tell us, we're collecting them, and they will shape what we build next.
