About our Anniversary Capsule Collection: Celebrating 4 Years of onewi

We’re celebrating four years of swim that fits like undies by dropping three brand-new styles in our Anniversary Capsule Collection 🎉 This capsule collection nods to the silhouettes our community already loves, but updates them with fresh details that show just how much onewith has evolved. These flattering swimsuits have already been making waves on Instagram, and we can’t wait for you to finally get your hands on them. Four years in, we’re just as obsessed with creating better-than-seamless swim that feels truly onewith your body, and having the best time doing it. Here’s to four years and three new swimsuits that fit like your favorite no-show undies!

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Idlewild High-Neck One Piece

It’s been a minute since we’ve introduced a new one piece, but after hearing you loud and clear on IG, we knew this one was a hit. Meet Idlewild, our high-neck, racer-meets-boatline one piece designed for that sleek, sculpted, totally edgeless bathing suit feel. Built with our patented better-than-seamless swimsuit construction, Idlewild gives you polished full coverage up top with a smooth, minimal silhouette everywhere else. And just like our beloved Bellows Plunge Neck One Piece, Idlewild doubles as a dig-free bodysuit... truly a wear-everywhere staple 💅

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Melba Knot Front Adjustable Back Bikini Top

Our best-selling Westerly Tie Front Bikini Top finally has a sister! Introducing Melba, a knot-front bralette-inspired bikini top that takes Westerly’s iconic shape and adds a highly requested upgrade: an adjustable, multi-way back. The strappy tie closures let you tailor your lift and support. Keep them straight for a clean look or cross them for extra hold. ✨ She’s a second-skin, dig-free superstar with major versatility.

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Sasco Tie-Sided Cheeky Bikini Bottom

Say hello to Sasco, our take on the classic tie-side bottom, but rebuilt with our signature fits-like-undies construction. You get the cute adjustability of traditional tie sides, paired with an ultra-smooth, bonded front and back for that beyond-seamless, dig-free swimsuit fit we’re known for. She’s cheeky, comfy, and ridiculously flattering. Sasco pairs with anything, but we’re especially obsessed with Melba: all those straps together? 🤌 Chef's kiss.

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These three new styles officially launched for pre-order on 11/14/25, with an estimated ship date of 12/1/25. All pieces come in Abyss (our best-selling black colorway) and in sizes XXS-4XL for truly size-inclusive, flattering swim. To shop the drop, check out the Anniversary Capsule Collection, and follow along on Instagram for all the behind-the-scenes moments and try-ons.