One With

One With is a female-founded, US-based swimwear brand launched in November 2021 by Hayley Segar, gaining significant traction after a Shark Tank appearance in January 2025. The brand's core mission is to provide women with comfortable, flattering swimwear that feels "one with" their body, inspired by the fit of no-show underwear. Their patented construction features raw-cut, elastic-free, and dig-free edges, utilizing two layers of bonded swimwear fabric (80% nylon, 20% elastane) for a smooth, second-skin feel. One With offers a size-inclusive range from XXS to 4XL, primarily selling bikini tops, bottoms, and one-pieces. The brand maintains a strong online presence, often going viral on social media platforms like TikTok, and emphasizes sustainability through its packaging.