For decades, women have accepted discomfort as a given when it comes to swimwear, with digging elastic, awkward seams and a “just don’t move too much” mentality baked into every suit. While fashion has evolved, swimwear stayed behind. And as the market continues to become saturated with “trendy” swimwear brands, very few are doing anything truly new when it comes to fit. What women have wanted all along, Onewith has delivered.
It took founder Hayley Segar years to pinpoint what felt so off about traditional swimwear. There was a major disconnect between how swimwear fit compared to the rest of her wardrobe, especially her no-show underwear, which always felt flattering. It wasn’t until she was sitting on the floor of her apartment, staring down a pile of swimsuits that all claimed to be “flattering,” when she had her aha moment. Frustrated with digging seams and squeezing elastic bands, she blurted out the sentence that would change her life: “I just want a swimsuit that fits like my favorite no-show underwear.”
From that spark came the foundation of Onewith, the first-of-its-kind swimwear brand that delivers exactly what women have been asking for all along: swimwear that doesn’t dig, squeeze or compress. Swimwear that fits like your favorite underwear.
Unlike traditional swimsuits that often prioritize trends over functionality, Onewith was built on real engineering and empathy. Instead of mimicking what’s always been done, Segar flipped the formula entirely. The result? A completely new category of swimwear. Onewith’s patented construction uses bonded, raw-cut edges that lie flat against your skin; no bulky seams, no rigid elastic, no harsh compression. The fit conforms to your body, creating a personalized, ultrasmooth fit that stays in place without digging in.
The innovation isn’t just in the construction, it’s in the philosophy. Onewith doesn’t try to force bodies into shapes or silhouettes. It meets you exactly where you are. Onewith changed swimwear so that women don’t feel the need to change themselves. There’s no squeezing, pinching or readjusting. Just freedom to move, relax, swim and live in your body without discomfort.
The sizing is also refreshingly inclusive, with styles offered from XXS to 4XL. As someone who has experienced weight fluctuations her entire life, Segar designed Onewith to create a universal experience of ease and confidence. It’s not about creating a “slimming effect” or hiding “problem areas,” it’s about removing the friction (literally and metaphorically) that so often comes with wearing a swimsuit.
The name Onewith isn’t just catchy branding, it’s a mission. Each suit is designed to be one with your body: to move with you, not against you. Whether you’re sunbathing, swimming, paddleboarding or chasing kids on the beach, you won’t be distracted by your suit shifting or digging in. And with no elastic band cutting into a specific spot, there are no odd bulges or lines, just your natural shape, uninterrupted.
When you first slip into Onewith, there’s even a bit of brand magic involved. “Warm it up,” as the company says. All Onewith swimsuits are lined with a smooth, flexible inner grip strip which keeps the raw-cut, edgeless suit up without using traditional seams or elastic that cuts into the skin. It’s because of this inner grip strip that you’ll need to give your Onewith flattering swimsuit a stretch before each wear. A little side stretch, a few moments of wear, and suddenly it molds to your body like it was custom-made for you. It’s smart, thoughtful design that delivers on comfort in a way no other brand has.
Today, as the swimwear market continues to fill with new labels touting “trendy” styles, few are doing anything truly original when it comes to construction and comfort. That’s where Onewith stands apart. It isn’t about louder prints or bolder cuts, it’s about finally fixing the thing women have been quietly complaining about for years: the way swimwear feels. Onewith is a true category creator. With no direct competitors and a clear mission, the brand isn’t just playing in the swimwear space, it’s rewriting the rules.
Segar continues to build on her mission, reminding women everywhere that it was never your body, it was the swimsuit. And now, with Onewith, you don’t have to settle. You can finally have a suit that looks good and feels amazing. Because yes, swimwear that fits like your favorite seamless underwear does exist. And it’s about time.
