Dolfin Swimwear Athletic One Piece Swimsuit - Pro Racerback Support

Our review of the Dolfin Swimwear Athletic One Piece finds it most suitable for swimmers who want a snug, performance-oriented training suit with reliable coverage. The single biggest reason to buy is its focus on durability and performance construction: a chlorine resistant, breathable fabric with UPF 50+ that is engineered to hold shape through frequent laps. The suit is clearly built for practice and fitness sessions rather than casual fashion wear, and the racerback and keyhole back prioritize shoulder mobility and support for repeated strokes.

Key Features

• Engineered Fit: The suit is designed to fit tightly to the body so it stays secure during laps and vigorous training sessions.
• Chlorine Resistance: The breathable fabric resists chlorine to help retain color and shape after repeated pool use.
• Supportive Straps: Pro racerback straps provide support and free shoulder movement without digging into the shoulders.
• Fast Drying and Sun Protection: Fabric dries quickly and offers UPF 50+ protection for time spent at the pool or beach.
• Front Lined Construction: The front lining provides modesty and an added layer for workouts without built-in bra cups.
• Performance Cut: A leg cut that sits above the hip offers a balance of coverage and range of motion for training.

Who It's For

The Dolfin Athletic One Piece suits competitive swimmers, lap swimmers, and fitness-oriented users who need a reliable training suit that endures frequent chlorinated use and lets shoulders move freely. It is also a good fit for swimmers who prefer a snug, streamlined fit and UPF protection during outdoor workouts.

Those seeking built-in cups or a fashion-forward, loose fit should look elsewhere, as the suit does not include bra construction and is intended to be worn snugly. Also, shoppers who are between sizes should follow Dolfin's recommendation to size up, since some customers report runs small.

Pros & Cons

Pros

• Durable, chlorine resistant fabric that helps retain color and shape through repeated use.
• Racerback straps and keyhole back deliver solid support and freedom of movement for swim training.
• UPF 50+ and fast drying fabric make it practical for outdoor pool sessions and quick turnarounds between workouts.
• Front lining offers modesty without adding bulk or molded cups.

Cons

• Sizing runs small for some customers, so accurate measurement and possibly sizing up are often necessary.
• Color fidelity is mixed for a minority of users who report fading over time despite chlorine resistance.

Specifications

Our Verdict

The Dolfin Athletic One Piece is a strong choice for swimmers who prioritize durability, sun protection, and a performance fit for regular training. It represents good value for athletes who want a reliable, fast-drying suit that holds shape, though careful attention to sizing is needed to avoid a too-tight fit. Overall, it is a practical training suit that does what it sets out to do.

Frequently Asked Questions

Is this suit suitable for competitive training?
Yes. The snug, engineered fit, racerback straps, and chlorine resistant fabric make it well suited for lap swimming and training sessions.

Does the suit include bra cups or built-in support?
No. The suit is front lined but does not include bra construction or molded cups.

How should I choose my size?
Use the size chart in the photo section and consider sizing up if your measurements are between two sizes, since the suit fits snugly and some customers report small sizing.