Onia Onia Soleil One-Piece Swimsuit - Moda Operandi
Onia Onia Soleil One-Piece Swimsuit - Moda Operandi

Onia Soleil One-Piece Swimsuit - Moda Operandi

Onia

$175.00

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Shipping Information: $10 standard U.S. shipping and complimentary returns on eligible Moda Operandi purchases. Sold and fulfilled by Moda Operandi, with current pricing, availability, and delivery details confirmed at checkout. shipping and returns information

Product Insights & Style Tips

Onia presents sunny confidence in the Soleil One-Piece Swimsuit, a clean, tailored riff on resort-ready silhouettes. The tie-front keyhole detail and contrast binding give this piece a signature moment, while stretch tricot offers a smooth, supportive feel that’s equal parts polished and practical for long days by the water. The fixed triangle cups keep the lines sleek, elevating the swimwear with a sense of modern ease.

Adjustable straps let you fine tune the lift and fit, so the suit sits comfortably as you move from sunlit lounge chairs to a dip in the pool. The high leg elongates the silhouette, pairing well with everything from oversized beach cover-ups to pared-back denim when you’re sneaking between poolside scenes and post-surf lunches. It’s a one-piece that travels well from vacation days to weekend getaways without missing a beat.

Onia’s Jersey-ready aesthetic and focus on clean, reliable fabrics translate here as a go-to in any warm-weather wardrobe. The Soleil's refined detailing nods to the brand’s easy luxe heritage, making it a standout choice for those who want resort polish with everyday ease.

Materials / Fabrication

  • Stretch tricot fabric
  • Tie-front keyhole detail
  • Fixed triangle cups
  • Adjustable straps
  • High leg silhouette
  • One-piece swimsuit
  • Clean, refined detailing

Recommended Care

  • Rinse after use and hand wash in cold water with a mild detergent
  • Avoid chlorine and heat; do not bleach
  • Lay flat to dry away from direct heat
  • Do not iron

Fit Notes

  • Adjustable straps let you fine tune lift and fit as you move.
  • Stretch tricot provides a smooth, supportive feel against the body.
  • Fixed triangle cups maintain a sleek, minimal silhouette.
  • The high leg opening elongates the silhouette and pairs well with cover-ups.
Onia Onia Soleil One-Piece Swimsuit - Moda Operandi

Styling Tips

  • Layer it with a cover-up to keep the clean lines of the suit’s tie-front detail visible.
  • Style it with heels to elevate the poolside look while preserving the sleek silhouette.
  • Finish with a hat for sun protection and a balanced, polished finish.

Style Check

Aesthetics: 9/10

Bold, resort ready silhouette with a tie-front keyhole and contrast binding establishes a signature moment. The high leg elongates the frame, while fixed triangle cups keep lines sleek. A refined, polished mood that reads both vacation chic and editorially fearless, translating seamlessly from poolside to city heat with confidence.

Craftsmanship: 7/10

Clean tailoring and durable stretch tricot deliver a smooth, supportive feel without sacrificing finesse. Visible details like the tie-front and binding hint at considered construction, while the overall form remains streamlined and practical. Slight room for critique on edge finishing, but the piece reads durable for long days in sun.

Affordability: $$$

The value feels justified by refined detailing and versatile wearability, aligning with a polished resort aesthetic. While the price sits in the premium swim tier, the design language, fit precision, and fabric behavior suggest a durable, go-to swimsuit that supports a elevated warm weather rotation.

The Onia Moodboard

Onia Delivers On All Your Beach Style Needs

Onia Delivers On All Your Beach Style Needs

Onia is one of those brands that just gets it — effortlessly cool, super wearable, and totally timeless. Launched in 2009 by Carl Cunow and Nathan Romano, this lifestyle label blends comfort and versatility in a way that feels both elevated and easy. Think clean lines, modern fabrics, and the kind of fit that makes you feel instantly pulled together without even trying. Whether it’s everyday staples or dreamy beachwear, every piece is thoughtfully designed to move with you — from busy mornings to laid-back weekends. The quality is next-level too, with durable, luxe fabrics and meticulous details that make even the simplest outfits feel special. Onia’s all about making chic, minimalist dressing feel like second nature — and honestly, we’re here for it.

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About Onia

Onia is known for its minimal and stylish essentials designed for travelers and those who go on adventures. The contemporary fashion label that specializes in swimwear and ready-to-wear products. Onia's focus is on creating clothing that is wearable, comfortable fit, and transition from day to night. Shop the latest collection from Onia, ranging in bikinis to one piece suits, dresses, pants, skirts and kimonos.