flow - since 2021
period underwear – comfort and secure protection under your period
Bye, bye tampons and pads. Hello comfort and peace of mind.
At Flow you will find menstrual panties with built-in absorbent technology that collects the blood and feels like regular underwear. Whether you bleed lightly, moderately or heavily, we have a model to suit your cycle and your everyday life.
Our panties are designed to give you security during your cycle - without having to insert anything into your body, without cumbersome disposable products.
Do you need more knowledge before you choose?
Read our guide to menstrual panties here →
Light flow, moderate flow, heavy flow
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Underwear for discharge and spotting
Panties for moderate bleeding
Underwear for heavy bleeding
We deserve better
Why choose menstrual panties from Flow?
After two fertility treatments and two births, I no longer wanted to use menstrual products that went inside the body – I wanted to be able to bleed in peace.
This was the beginning of Flow – the first period underwear on the Danish market.
Today, we make period underwear with a focus on comfort, quality, and responsible production – created by people who menstruate themselves.
✔️ Soft, skin-friendly materials
✔️ Different absorbency levels
✔️ Comfort like regular underwear
✔️ A more eco-friendly alternative to disposable products
Our mission is to make menstruation more free, secure, and less inconvenient — without compromising on style or function.
Best regards, Cathrine
New to period panties?
Need help?
FAQ
Wash & use
The life expectancy for socks and underwear in general is approx. 3 years. These are clothing items that are worn and used every day.
Since we do not add chemical treatment to the bond, no function is lost.
If you take good care of your panties, wash them according to instructions, then the quality is yours period underwear from us so good that you can easily use them for 3 years and even longer.
Here you will find our guide to how to take the best care of yours period underwear.
It depends on you flow and your cycle day - as well as the absorbency of the panty.
But to change period underwear at least morning and evening is good hygiene - think of your absorbent underwear just like pads and tampons. It has to be changed every now and then.
But unlike, for example, tampons, you are not at risk of Toxic Shock Syndrome, then period underwear is a non-invasive menstrual product.
Fit & style
We have period underwear, which suit different bodies - regardless of whether you are into low rise, mid rise or high rise fit.
Period flow Letter and Period flow Shorts both have a high waist, which is loved by many for the feeling of a hug around the stomach.
Period flow Cheeky has a more sporty look but with a wide and soft elastic at the waist - it is mid-rise.
Then we have too the classic low-cut fit, which is a super nice, basic period underwear if discretion under the trouser leg is *your thing*.
On each product you will find a measurement chart that can guide you based on the size you normally choose in underwear.
Some materials such as cotton can be used - if our recommendation is that you should go up or down in size rather than choose your usual size, then this will be specified on the product.
Dive into Flow's articles
Do you want to know more?
Why aren't panty liners always the best choice?
Did you know that panty liners can increase vaginal dryness, cause irritation and redness?
In addition, both sanitary napkins and panty liners can be filled with heavy metals.
Read the article about why you might need to rethink your panty liner →
Why is my skin suddenly oily and blemished?
Your cycle means major hormonal changes in your body depending on which phase you are in - and they can often also be seen in your skin.
Huge glow up or oily moustache, read the article about how your cycle affects the skin →
Do you also get an upset stomach during menstruation?
Don't worry. You're not alone. It's actually quite normal - in English it even has its own term: Period poops.
Read more about what happens in your body during your period and why it affects your intestines →
Premium quality menstrual panties
Menstrual panties should first and foremost feel like your favorite underwear.
At Flow, we develop menstrual panties that combine discreet absorbent technology with comfort, thoughtful fits and exclusive materials. Whether you have light or heavy periods, you will find a model that suits your body, your everyday life and your cycle.
Our menstrual panties are developed in Denmark and produced at specialized factories in Europe with a focus on quality, durability and comfort.
How do menstrual panties work?
Menstrual panties look and feel like regular panties, but have a discreet absorbent panel sewn into the crotch. They are one of the few menstrual panties that you can wear before you actually bleed.
The panel consists of several functional layers that help absorb menstruation, keep the skin dry and give you a greater sense of security throughout the day.
Many people use menstrual panties as an alternative to pads, while others combine them with a menstrual cup or menstrual disc on the heaviest bleeding days.
Find the model that suits your period
No two periods are the same.
That's why we have developed several different models and absorption levels.
At Flow you will find, among other things:
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High-waisted menstrual panties
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Regular-waisted menstrual panties
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Menstrual shorts for the night
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Menstrual panties for teenagers
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Soft models in organic cotton
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Absorbent g-string for light days
Then you can put together a wardrobe that suits your entire cycle.
Why women choose Flow
We believe that menstrual panties should be something you look forward to wearing.
That's why we develop products with a focus on both function and comfort.
At Flow you get:
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Premium quality developed in Denmark
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Produced in Europe
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Free from PFAS and biocides
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Soft and carefully selected materials such as organic cotton, organic merino wool and Econyl
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Multiple absorption levels
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Models for day, night and training
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Designed by people who menstruate themselves
You can read all the reviews of Flow here and read for yourself why women love Flow.
Which menstrual panties should I choose?
If you are new to menstrual panties, we recommend starting with 3-5 pairs so you have enough for your entire period.
Many people combine different models – for example, a high-waisted favorite for everyday use, extra absorbent shorts for the night, and a lighter model for the last days of bleeding.
This provides the greatest flexibility and the best experience.
More than menstrual panties
At Flow, we work to ensure that more people can feel confident in their own bodies.
That's why we not only develop menstrual panties, but also menstrual swimwear, absorbent underwear, cycle care and a vast universe of knowledge about menstruation and women's health.
From menarche to menopause – we are with you all the way.
Frequently asked questions about menstrual panties
What are menstrual panties?
Menstrual panties are underwear with a discreet built-in absorbent panel that collects menstrual blood. From the outside, they look and feel like regular panties, but the inside consists of several functional layers that help absorb the bleeding and provide a dry and comfortable feeling. Many people use menstrual panties as an alternative to pads or as a supplement to a menstrual cup or menstrual disc.
How do menstrual panties work?
Menstrual panties work by using an absorbent panel sewn directly into the panty. The panel consists of several layers with different functions that together help absorb menstruation, transport moisture away from the skin and reduce the risk of leakage. When the panty is full, you simply change to a clean pair – just like you would change a pad.
How long can you wear menstrual panties?
It depends on how heavily you bleed and which model you use. On light days, many people can wear the same menstrual panty for an entire day, while heavier bleeding may require you to change earlier. The most important thing is to change your panty when it feels saturated or damp.
Can menstrual panties replace pads?
Yes. Many people use menstrual panties as a full alternative to pads. For very heavy periods, some choose to combine them with a menstrual cup or menstrual disc for extra security, especially during the first few days of bleeding or at night.
Which menstrual panties should I choose?
It depends on your bleeding and your preferences.
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High Rise is our classic high-waisted favorite.
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Soft Collection is for you who want extra soft menstrual panties in organic cotton.
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Cheeky has an extra long absorbent panel and is ideal for frontal bleeding or if you sleep on your stomach.
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Shorts provide maximum coverage and are particularly popular at night or during heavy menstruation.
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The tea is developed with fit and sizes for children and teenagers.
Many people choose several different models so they have the right solution for the entire cycle.
How many menstrual panties do I need?
It depends on your period and how often you wash. Many people start with 3-5 pairs, while others prefer 5-7 pairs, so they have enough for the entire period without having to wash in between.
How do you wash menstrual panties?
Rinse the panties in cold water after use until the water runs clear. Then wash them in the washing machine at the recommended temperature without fabric softener, as fabric softener can affect the absorbent layers. Let them air dry – avoid using a tumble dryer if you want to keep the panties functioning for as long as possible.
Read the whole our guide on how to wash menstrual panties here.
Is Flow free of PFAS and biocides?
Yes. All Flow menstrual panties are PFAS-free and free of added biocides like nanosilver. We develop our products with a focus on quality, comfort and materials that we ourselves would like to have close to our bodies.
You can read more about the safety of menstrual panties here.
Can teenagers use menstrual panties?
Yes. Menstrual panties are a popular choice for the first period because they are easy to use and feel like regular underwear. Flow has also developed a special Teen model with fit and sizes for children and young peopleSeveral of our menstrual panties also come in sizes 2XS.
What is the difference between the different models?
The difference lies primarily in fit, absorption level and use.
Some models are designed for maximum comfort during everyday life, others provide extra protection at night or during heavier bleeding. All Flow menstrual panties are built on the same philosophy: They should look and feel like regular underwear, while giving you the security you need throughout your cycle.
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