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.

The Neurons SF821 swimsuit is a vibrant celebration of energy and connection, inspired by the intricate networks of the mind. The Classic XBack cut with wide straps and a more closed back ensures stability, while the open-back profile supports natural movement. The front lining provides comfort and modesty, while the Carvico XLance eco fabric ensures chlorine resistance, quick-drying performance, and eco-conscious durability. Perfect for pool training, triathlon prep, or open-water swims, this swimsuit combines scientific inspiration with technical excellence.

Neurons - Delfina Classic XBack SF821 Swimsuit

£47.00

Eco fabric Carvico Xlance – sustainable, high‑performance Italian textile

Celestial Vortex print – swirling galaxy design in blues, blacks, and whites

Snug, structured fit – longer in the body, less stretch for secure performance

Higher neckline for added coverage

Scooped X‑back for support and freedom of movement

Chlorine‑resistant, quick‑dry fabric for lasting durability

Ideal for serious training, lane swimming, and competitive use

Especially suited for taller swimmers or those seeking extra support

Delfina swimwear – trusted by athletes worldwide