Is the SF821 chlorine-proof?

Yes — the SF821 is made from chlorine-resistant Italian Carvico XLANCE fabric, designed to keep its fit and colour even with frequent pool use.

What’s the difference between SF821 and SF811?

The SF811 is slightly shorter in body length with a lower neckline. The SF821 gives more torso length and coverage, with the same secure X-back design.

How do I choose the right size?

Check the size chart above. If you’re between sizes, go up for more torso room. We also recommend looking at our customer photos to see real fit examples.

Is the fabric eco-friendly?

Yes — SF821 uses recycled fibres in its Carvico XLANCE fabric, making it both performance-driven and sustainable.

How should I care for my swimsuit?

Rinse immediately after use, wash gently with mild detergent, and line dry in the shade. Avoid wringing, tumble drying, and bleach.

Classic X‑Back SF821
Thick‑Strap Training & Leisure Swimsuit

Name: Classic Xback Swimsuit SF821
Brand: Delfina
SKU: SF821
Price: 44.00 GBP
Availability: InStock

The SF821 Classic X-Back combines secure support with lasting comfort. Designed with thick straps and a stabilising X-back, this swimsuit stays perfectly in place during lap swimming, aqua fitness and holidays. Made with eco-friendly, chlorine-resistant Italian Carvico XLANCE, it retains its shape and colour season after season. A lined front provides extra confidence and coverage.

The SF821 Classic X‑Back is designed for swimmers who need both secure support and lasting comfort. With thick shoulder straps and a stabilising cross‑back, this one‑piece stays perfectly in place during lap swimming, aqua fitness, triathlon training, and holidays by the pool.

Made from Italian Carvico XLANCE eco fabric, it is chlorine‑resistant, quick‑drying, and colourfast, retaining its shape and vibrancy season after season. A front lining provides modesty and confidence without restricting movement, making it ideal for both high‑intensity training and relaxed leisure swims.

Engineered for durability, the SF821 spreads pressure evenly across the shoulders, reducing strain and keeping you comfortable through long sessions. Whether you’re preparing for competition or enjoying open‑water adventures, this swimsuit is eco‑friendly, supportive, and built to last.

Discover our full SF821 collection, from playful animal prints to bold abstract designs, all crafted with the same chlorine‑proof performance fabric.

Real swimmers, real fit

Classic X-Back SF821 - Key Features

Thick straps X-back for secure, stay-put support.
Chlorine-resistant, eco Carvico XLANCE fabric - built for daily pool use.
Lined front for shape and modesty.
Ideal for training, aqua classes, all aquatic practice and beach days.
Available in multiple prints — browse gallery & social media photos.

Buy XBack SF821

Care & Durability – Carvico Xlance Eco Fabric

Fabric: Italian Carvico XLANCE (eco recycled) — chlorine proof.

Lining: Fully lined front for modesty and structure.

Care: Rinse after each swim, hand wash only. Line dry away from direct sunlight. Avoid bleach, tumble drying, and heat.

About Fabrics and Care

Fit & Sizing Guide – SF821

- True to size for most swimmers. Check the size chart on each product page
- If you are between sizes or prefer extra room in the torso, we recommend sizing up.
- The SF821 is slightly longer in body length and has a higher neckline than the Xback SF811. Choose SF821 for more coverage, or SF811 for a lower neckline and shorter fit.
- For fuller busts: the thick straps and X-back offer greater stability than narrow strap styles.

Real Customers, Real Fit

We know that choosing the right plus size swimsuit online can feel tricky, which is why we share customer photos and feedback to help you shop with confidence. The picture on this page shows the Xback SF821 in real life
Many customers tell us they feel comfortable, supported, and stylish, whether at the swimming pool, the sea, or on holiday.
We love when you share your photos and experiences and giving us your opinion about new prints. Share your own photo on our page @curvybathers to help other women find their ideal fit and inspire others on their swimwear journey!