Relaunch 2026
Period swimwear
At Flow you will find menstrual bikinis and menstrual swimsuits Designed to give you confidence in the water with light to moderate bleeding.
Our menstrual swimwear looks and feels like regular swimwear – with discreet, built-in absorbent technology.
Choose from different fits and colors and find the model that suits your summer.
Read more about how to have the best vacation with your period here →
Period swimwear
Why women choose our menstrual swimwear
You get premium materials, beautiful details and swimwear you can wear whether you're bleeding or not.
✓ Built-in 3-layer absorbent technology with protective membrane
✓ Suitable for light to moderate bleeding
✓ Can be used throughout the cycle – even without menstruation
✓ Sewn in Portugal in exclusive Italian materials such as ECONYL®
✓ Mix and match bikinis and swimsuits and create your favorite set
✓ Sizes from 2XS-3XL
If you are looking for menstrual swimwear for children and teens, find Johanne Bikini here →
We are making sure that great women in sports stay in our common memory and history books
The story behind the names
Our collection of period swimwear is named after amazing athletes who have won both medals and hearts.
Under each style you can read more about each female athlete.
Jenny Swimsuit
Jenny Swimsuit is named after Jenny Kammersgaard.
Johanne Bikini
Johanne Bikini is named after Johanne Øland Frøkjær.
Ragnhild Bikini
The Ragnhild Bikini is named after Ragnhild 'The Golden Torpedo' Hveger.
Bikini
Sidsel Bikini is named after Sidsel Jørgensen.
Sara Bikini
The Sara Bikini is named after Sara Nielsen.
How do I wash my period swimwear?
Before use: Wash your period swimwear at 30-40 degrees before using it.
Step 2: Wet directly into your swimsuit when you have your period
Step 3: Rinse the pad in your period swimsuit by hand after use until the water runs clear.
Step 4: Put the swimsuit in a laundry bag and wash with similar colors at 30-40 degrees and let it air dry inside out.
Bloody Clean - now in travel size
Need to do laundry during your holiday?
In 2026, Flow will relaunch period swimwear
How does period swimwear work?
Our period swimwear is designed with:
〰️ A soft layer close to the body that directs fluid down into the next layer
〰️ An absorbent core that stops bleeding
〰️ A water-repellent, breathable membrane that minimizes the risk of bleeding through
The material dries quickly and feels light – even after a trip in the water.
Read our full guide to period swimwear here →
FAQ
What is menstrual swimwear?
Period swimwear is swimwear with built-in absorbent technology that makes it possible to swim safely during your period with light to moderate bleeding.
You know the absorbent technology from our period underwear, and with period swimwear it is added to the bottom of all all styles as well but in a quick-drying quality.
Read our guide to period swimwear here and learn how it works →
Which style should I choose?
We will launch a large swim collection in 2026, which will include both period swimsuits and bikinis.
You can choose between different fits, colors and materials. Enjoy!
What's included in your purchase?
Each Period Swim style is packaged in a small resealable bag that you can store and use on the go when your swimwear is wet.
We can also recommend buying Bloody Clean, which is a special detergent that super gently washes your swimwear clean and removes any odor.
We also have it in travel size, find Bloody Clean here →
Menstrual swimwear – swim safely throughout your cycle
Menstrual swimwear is designed so that your period doesn't have to determine whether you jump in the ocean, go to the beach or say yes to a swim.
At Flow you will find menstrual swimwear that gives you the freedom to bathe, swim and be active – even when you are on your period. Our collection includes both menstrual bikinis and menstrual swimsuits with discreet built-in absorbent technology, so you can feel safe both in the water and on land.
From the outside they look like ordinary swimwear. Inside is the technology that makes the difference.
How do menstrual swimwear work?
All our menstrual swimwear is designed with a discreet sewn-in absorbent panel consisting of three functional layers.
The technology is designed to protect during light to moderate periods without compromising fit or comfort. If you have heavier bleeding, we recommend combining the swimwear with a menstrual cup or menstrual disc for extra security.
This means you can bathe, swim, paddleboard or play beach volleyball without having to worry about pads or tampons.
Menstrual bikini or menstrual swimsuit?
It depends on your preferences.
Our menstrual bikinis gives you the freedom to mix and match tops and bottoms to find the fit that suits you best.
If you prefer a complete solution, our menstrual swimsuits designed with elegant cuts, flattering fits and the same discreet absorbent technology.
No matter which model you choose, you'll get swimwear that can be worn all summer long - even on days when you're not menstruating.
Made for movement
Menstrual swimwear should be able to withstand more than one dip.
That's why our collection is sewn in exclusive Italian materials with 4-way stretch, which follow the body's movements, dry quickly and feel comfortable all day long.
All models are produced in Portugal with a focus on quality, durability and a timeless design that you can use season after season.
Why women choose Flow
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Menstrual swimwear with built-in 3-layer absorbent technology
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Wide selection of menstrual bikinis and menstrual swimsuits
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Protects against light to moderate menstruation
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Can be used throughout the cycle
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Quick-drying Italian quality materials
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Produced in Portugal
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Free from PFAS and biocides
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Looks and feels like regular swimwear
Summer shouldn't be put on hold
Far too many people skip the beach, pool or indoor swimming pool because of menstruation.
At Flow, we believe that no one should miss out on summer fun because of their cycle. That's why we develop menstrual swimwear that gives you the freedom to swim, move and enjoy the water – with greater confidence throughout your cycle.
Frequently asked questions about menstrual swimwear
What is menstrual swimwear?
Menstrual swimwear is swimwear with a discreet built-in absorbent panel that makes it possible to swim during menstruation. At Flow you will find both menstrual bikinis and menstrual swimsuits.
How do menstrual swimwear work?
The absorbent panel consists of three functional layers that help protect against light to moderate menstrual flow. The swimwear is designed for use both in the water and on land. The absorbent layers are made of quick-drying materials.
Can I swim with menstrual swimwear?
Yes. Flow's menstrual swimwear is designed for swimming, beach trips and other activities in and around water.
What if I'm bleeding heavily?
For heavy periods, we recommend combining menstrual swimwear with a menstrual cup or menstrual disc for extra protection.
What is the difference between a menstrual bikini and a menstrual swimsuit?
The absorbent technology is the same. The difference lies in the fit and design. The menstrual bikinis consists of a top and a bottom, while the menstrual swimsuit is a unified model.
With our menstrual bikinis you can mix and match and create exactly the set you want.
Can I use menstrual swimwear without menstruation?
Yes. All models function like and look like regular swimwear and can be worn all summer long – even when you are not menstruating.
How quickly does menstrual swimwear dry?
Our swimwear is sewn from quick-drying Italian materials such as Econyl and fabric with 4-way stretch, which feels comfortable both in and out of the water.
How do I wash menstrual swimwear on vacation?
We recommend that you wash your menstrual swimwear in Bloody Clean, which gently cleans the swimwear and removes any odor. That's why we've also made Bloody Clean in a small travel size version.
How do I wash menstrual swimwear?
Rinse the swimwear in cold water after use, wash it at the recommended temperature without fabric softener, and let it air dry to maintain its absorbent properties.
You can read the whole our guide on how to wash your menstrual underwear and swimwear here.
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