Plunge Tortoise One-Piece | Black
- Unit price
- /per
Size Guide


The picture of understated glamour and appeal, our plunge tortoise one-piece features a neckline that is the just the right amount of sexy. With an amazing fit, lovely tortoise hardware, and a rich fabric and feel, you'll always feel beautiful!
Chic. Classic. Smart. There's something about a black suit that inspires confidence. Always flattering, never boring, perfectly timeless.
To keep your Helen Jon swimwear looking its best, hand wash in cold water and lay flat to dry. Do not twist or wring, and avoid drying in direct sunlight.
Rinse promptly in cold water after swimming to remove chlorine, saltwater, sand, and other residue. Avoid hot tubs and Jacuzzis, as prolonged exposure to heat and chemicals can damage swimwear fabrics.
Some sunscreens may cause fading or color transfer. Avoid spraying or applying sunscreen directly to the fabric.
View full care instructions
Enjoy complimentary shipping on U.S. orders of $250 or more.
Orders are typically processed within 1–2 business days. USPS and FedEx shipping options are available at checkout, with rates and estimated delivery times based on your selected shipping method.
For FedEx Overnight delivery, orders must be placed by 1 PM CT on business days for same-day processing.
View full shipping policy
Full-priced items and items purchased at less than 40% off are eligible for return or exchange within 14 days of delivery.
Items purchased at 40% off or more during a promotion are eligible for exchange or store credit only. Last Call items and items permanently marked down 50% or more are final sale.
Items must be unused and returned in their original condition and packaging. Swimwear must have the sanitary liner intact.
Refund returns are subject to a $9.99 return shipping fee. Exchanges and store credit returns are free.
View full returns policy
Helen Jon returns portal
Adding product to your cart
- 5 stars: 6 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I absolutely love the black tortoise one piece. The very first swimsuit that I bought from Helen Jon years ago was the black tortoise hipster and bikini top while on vacation in Kiawah Island, SC. And ever since I bought that first swimsuit, I have been hooked on Helen Jon. It is a timeless swimsuit whether as a one piece, tankini or bikini. I couldn't be happier with the fit.
This swim suit is stunning beautiful. It is classy and provides sufficient coverage both in the bust area and bottom area. The suit molds comfortably to your figure without being tight. Extremely comfortable and flattering.
The most flattering and stylish one piece I have ever worn!
Love the way this feels and looks! High quality!
Helen Jon suits always fit me the best and worth the investment! This is probably my 6th Helen Jon suit and I'm always happy with them. Fits true to size and covers where I want it to. Best one-pieces around!
Beautiful suit. Flattering fit. Quality material. 5’8 135 and found the medium a perfect fit.