One Piece n°6 - Collab' x Monday in the Sun

$61.00 USD $129.00

1 in stock
The cut 
  • The neckline remains very light on this model. It is suitable for all cup sizes. 
  • The straps are adjustable in the Bottomback with 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 for the adjustment, the iron eyelets slide very poorly on the swimming costume materials and tend to loosen the straps too quickly; on the other hand, the bows do not loosen when you are moving.
  • The plunging V-shaped back is reminiscent of the V-shaped neckline in the front, creating a lovely asymmetry.
  • The swimsuit is lined with our softest material.

With this model, you will be at ease in all circumstances: it is sculpting and sublimating! 

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 
Chloé is 1m80, a C cup and wears a size M.
Sigrid is 1.65m tall, is a D-cup, size 38 and wears M.

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.

80% Recycled Polyamide. 20% Elastane.
Weight: 190gr.
UPF 50 (sun protection).
Bi-directional stretch (marries muscles & movements: great sensation)
Label: OEKO-TEX Standard 100.
Italian fabrics.

🌞 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 4 reviews
maillot une pièce brodé

Modèle délicatement brodé, très joli, bien coupé, j'adore. Réglage des bretelles un peu compliqué.

Caroline B
Et si on se mariait

Après qq questions posées à Lauren en lui montrant ma robe de mariée et les soucis de marque de bronzage pouvant apparaître d’ici là. Qq propositions plus tard , ce maillot était une évidence.
Il est parfait , mille mercis à vous , encore plus pour le petit mot qui me touche beaucoup.
Une équipe parfaite, le souci du détail des produits d’exception … MERCI ♥️

Ludivine Vervloessem

Malheureusement, le guide des tailles ne correspond pas dans mon cas. Il est une taille trop petit. J avais enlevé la protection mais etl ai essayé avec une culotte . Pour cette raison, il était inutile de le renvoyer et de recevoir le même modèle taille L. En dehors de ça, ce maillot est magnifique avec la broderie.

Très joli et confortable

J'avais peur que le maillot soit trop grand en haut en prenant ma taille de bas mais pas du tout, la matière et le système de noeud permettent de très bien l'ajuster.
La broderie est magnifique.
Très contente de mon achat.