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Onyx Long-Sleeve One-Piece Swimsuit
Import duties included · Taxes calculated at checkout
Arrives Mon 10 Aug – Wed 19 Aug
Free shipping on orders over $75
30-day returns
Unworn, with the hygiene liner intact
Secure checkout
- Sleek long-sleeve design
- Sophisticated one-piece silhouette
- Flexible and supportive fabric
- Ideal for swimming and lounging
Embrace effortless elegance by the water with our Onyx long-sleeve swimsuit. Designed to offer a sleek, sophisticated silhouette, this piece combines modern coverage with a timeless aesthetic that transitions perfectly from a morning swim to an afternoon seaside lounge.
Crafted from a smooth, flexible fabric blend, this suit provides a comfortable, supportive fit that moves with you. Whether you are catching waves or enjoying a coastal brunch, its refined design ensures you feel confident and polished all day long.
Care +
Rinse thoroughly in fresh water after use and hang to dry in the shade.
Size & fit +
Sereia swimwear follows international sizing. If you're between sizes, or prefer a relaxed fit, size up.
In stock now: XL, 2XL, L, S, M
Full size guide →Shipping & returns +
Tracked delivery worldwide. Free over $75, otherwise a flat $6.95.
Orders are prepared in 2–4 business days before they ship.
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