Nii HAi, the London-based swimwear and ready-to-wear brand founded by Rosie Williams in 2019, has collaborated with Zara Larsson's label MAIN ROSE on a collection that blends both creative identities through a shared appreciation for confident, expressive dressing.
The partnership originated from Larsson's genuine, long-standing love of the brand. The resulting Nii HAi x MAIN ROSE collection reimagines swimwear versatility by offering every bikini top and bottom as separate, fully interchangeable pieces designed to be worn beyond the beach. Through this approach, the brands seek to encourage endless mix-and-match combinations that transition seamlessly between swim and ready-to-wear styling. From the Butterfly Triangle Bikini Top in Butterfly Stripes to the Triangle Bikini Bottom in Aqua Snake, the collection reflects Nii HAi's signature design philosophy, which balances Mediterranean ease with urban sensibility.
What Makes This Trend Stand Out
- Interchangeable Swimwear
- Modular bikini separates create space for personalized styling systems that extend product relevance across beach, streetwear, and travel wardrobes.
- Creator-led Fashion Collaborations
- Authentic partnerships between apparel labels and music-driven personal brands can translate fan affinity into limited collections with built-in cultural credibility.
- Swim-to-street Styling
- Versatile swim pieces designed for everyday layering signal demand for hybrid apparel that blurs seasonal categories and increases wear frequency.
Sectors Adopting This
- Swimwear
- Category growth is emerging around customizable separates and fashion-forward silhouettes that make swimwear more adaptable to individual identity expression.
- Ready-to-wear Fashion
- Cross-category collections offer new merchandising models where resort, street, and nightlife aesthetics merge into flexible wardrobe capsules.
- Celebrity Licensing
- Artist-owned labels and fashion collaborations provide a pathway for entertainment personalities to convert personal style into scalable consumer products.
