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Last updated: 10 September 2026
Your privacy matters to us. This notice explains what information we collect, how we use it and the choices you have.
THE INFORMATION WE COLLECT
Your name, email address, phone number, billing and delivery address, order details, account login details, and anything you tell us when you get in touch. When you visit our website, we also collect technical information such as your IP address and how you use the site, through cookies.
We need your contact and delivery details to process an order. Without them, we cannot complete your purchase.
HOW WE USE YOUR INFORMATION
MARKETING
You can unsubscribe at any time using the link in any of our emails or by emailing us, and we will stop.
WHO WE SHARE IT WITH
We never sell your information. We only share it with trusted providers who help us run SIRÉNA, such as our website platform, payment providers, delivery companies, email and analytics providers, and our accountant, or with authorities where the law requires it.
Some of these providers are based outside the UK. Where this is the case, we make sure your information is protected by appropriate legal safeguards, such as UK Government adequacy approvals or approved data transfer agreements.
HOW LONG WE KEEP IT
We keep order and payment records for [6] years for tax purposes, account details until you close your account, and mailing list details until you unsubscribe. Anything else is kept only for as long as we need it for the reason we collected it, then securely deleted.
COOKIES
Essential cookies make our website work. We only use [analytics and] advertising cookies with your consent, and you can change your choices at any time in [our cookie settings].
OUR COMMITMENT TO DATA SECURITY
We use appropriate security measures and reputable, secure providers to protect your information from unauthorised access, loss or misuse.
YOUR RIGHTS
You have the right to ask us to access, correct or delete your information, to restrict or object to how we use it, and to transfer it to you or another organisation. Where we rely on your consent, you can withdraw it at any time. We do not make decisions about you using solely automated means.
To make a request, email evie@swimwithsirena.com. We may ask for proof of identity. We will respond within one month, and there is normally no charge.
COMPLAINTS
If you are unhappy with how we have handled your information, please contact us first by email or post. We will acknowledge your complaint within 30 days and let you know the outcome as soon as we can.
CHANGES TO THIS POLICY
If we update this policy, we will post the new version on this page with the date at the top.
Luxury Swimwear
Our Philosophy
100% organic cotton lining.
Crafted from ECONYL® regenerated nylon.
Adjustable ties, shaped to sit beautifully.
Ethically made, with care for you and the planet.
The Collections
Where every collection begins
Born from a love of the ocean, endless summers and feeling beautiful in your own skin. Each SIRÉNA collection captures a different moment and adventure — designed to become part of your summer memories.
I.
The PALMA Collection
Explore the line →II.
The MILA Collection
Explore the line →III.
The SIENNA Collection
Explore the line →Join Our Mailing List
Be the first to hear about our latest collections, special offers and promotions, plus enjoy 10% off your first order.
The Edit
By Style
Three distinct silhouettes, each designed for a different way of wearing the sea.
I.
The PALMA Collection
Easy, sun-worn shapes drawn from the coastline — soft ties, clean lines, made for long days by the water.
Explore →II.
The MILA Collection
Gathered, textured pieces that move with you. Soft on skin, light on the planet.
Explore →III.
The SIENNA Collection
Supportive, sculpted shapes for those who want coverage without compromise.
Explore →SIRÉNA creates beautifully crafted, sustainable swimwear with an exceptional fit — designed to help women feel confident, comfortable and effortlessly elegant. Every piece is thoughtfully made with both style and wellbeing at its core, combining timeless design with conscious craftsmanship.
Crafted from ECONYL® regenerated nylon and lined with certified organic cotton, our swimwear is free from microplastics and toxic, hormone-disrupting chemicals where it matters most. Because true luxury is never just about how something looks — it is about how it is made, how it feels against your skin, and the confidence it gives you every time you wear it.
Sustainability sits at the heart of everything we make. Every SIRÉNA piece is designed to be worn for years, not seasons — considered in its materials, gentle on your skin and kinder to the ocean it was made for.
Our swimwear is crafted from ECONYL® regenerated nylon, a fabric spun from reclaimed fishing nets and other nylon waste recovered from the sea. It performs like the finest virgin nylon, but it takes waste out of the water rather than adding to it.
Every piece is lined with GOTS-certified organic cotton, so there is no plastic against your skin where it matters most. The cotton is grown without synthetic pesticides and certified from field to finished garment.
We produce in small batches, made to order wherever we can, so we are not left with unsold stock. Our packaging is plastic-free and recyclable, and we send nothing out that you cannot put straight into your paper recycling.
We are not perfect, and we would rather be honest about that than claim otherwise. We are working on every part of the process, one step at a time, and we will keep telling you exactly where we are up to.
Everything you might want to know, in one place. Tap a question to see the answer.