One Piece n°3 - Sun yellow

$59.00 $116.00

1 in stock

The asymmetrical V-neckline and back are exquisite.

A bit retro. Beware, you'll be the envy of many on the beach with this one. Don't forget that it is produced in small series.

A slightly brilliant yellow, sublime.

The cup

  • A sublime neckline! Slightly plunging.
  • Adjustable straps by an Italian knot system.
  • No iron or plastic (let's avoid micro-waste) to adjust the straps but knots. The bows are small and pleasant to wear. As far as adjustment is concerned, the iron eyelets slide very poorly on swimwear materials and tend to loosen the straps too quickly; on the contrary, the knots do not loosen when you are moving.

Size advice 
To choose your size of One-piece, refer to your size of Bottom. For example, if you are a size 36 in panties, you should choose a size S in One-piece. The straps are adjustable and will fit your top.
This swimming costume fits true to size. If you are over 1m70 and not sure which size to choose, go up a size.

If you have any doubts or questions about the size, please contact us at

Our models
Laetitia is 1.76m tall, a B cup and wears a size S. (36 in Bottom)
Carmen is 1m85, an A cup and wears S. (36 in Bottom)
Maeva is 1.73m tall, wears an A cup and wears a size S.  (36 in Bottom)

Fabric & Care

Posidonia's objective is to use a fabric that contributes to cleaning the oceans and the environment, but also very elegant and comfortable to free women from any constraint of movement. An eco-responsible jersey is also a sustainable jersey, which is why I have chosen the highest range of European fabric made up of waste such as fishing nets and plastic bottles.

85% ecoyarn PES. 15% Elastane.
Weight: 190gr.
Labels: OEKO-TEX Standard 100. Global Recycled Standard.
Fiber recycling and fabric manufacturing: Spain. The energy used at the plant is solar. Ecological printing. Kilometer 0 between the collection of plastics (bottles) and the processing plant.

🌞 UV protection SPF50


The sea and the salt do not alter your swimsuits if you rinse them with fresh water after each use. Let it dry flat or laid out on its own.

Hand wash your swimsuit. You can wash it in the washing machine at the end of your vacation, on a delicate cycle (max. 30 degrees), with a non-detergent detergent, without spinning or drying cycle.

The chlorine resistance index of our materials is very good. The colors, however, are more delicate.

Customer Reviews

Based on 9 reviews
Nora Ginestet

Maillot de qualité, original et flatteur ! Merci beaucoup!

Superbe maillot !

Très beau maillot une pièce. La couleur et les détails sont très beaux.
Juste un petit point de vigilance sur la taille, je porte habituellement du 36/S mais j’ai du prendre du M (le S taille assez petit ☺️)

Très bien

Très beau tant au niveau de la coupe que de la matière et très confortable en toute circonstance (baignade en lac, descente du Rhin à la nage...)

Alizée R

J'ai commandé le Une Pièce 3.0 Jaune Soleil et j'en suis ravie ! L'envoi a été très rapide et le service client incroyable aussi car après avoir fait une erreur de taille dans ma commande par inadvertance, le service client a remplacé le maillot de mauvaise taille par la bonne sans problème.
Il taille très bien et sa couleur est superbe. Hâte de le porter plus souvent.
Merci !

Gabrielle Joly
Maillot jaune, taille petit

Maillot expédié très rapidement !
Livré avec un petit filet, très sympa.
En revanche, le maillot était un peu trop petit, j’aurai dû prendre une taille au-dessus !