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100% satisfaction guarantee

We'll guide you and give you a new pair of panties – if that doesn't work either, you'll get your money back.

Loved by +20,000 women

We are created by menstruators
for menstruators.

4.7 on Trustpilot

"The best briefs on the market!"

Buy 5 - save 20%

You can mix and match
to suit your needs.

Wir verdienen Besseres.

Why choose period underwear from Flow?

After two fertility treatments and two births, I no longer wanted to use menstrual products that went inside my body - I wanted to be able to bleed in peace.

This was the beginning of Flow - the first menstrual underwear on the Danish market.

Today, we make menstrual underwear with a focus on comfort, quality, and responsible production - created by people who menstruate themselves.

✔️ Soft, skin-friendly materials
✔️ Different absorption levels
✔️ Comfort like regular underwear
✔️ A more environmentally friendly alternative to disposable products

Our mission is to make menstruation freer, safer, and less complicated - without compromising on style or function.

Sincerely, Cathrine

What we are most proud of

5 gute Gründe, warum Sie uns lieben werden

DAS HERZ STEHT IMMER AN ERSTER STELLE

We are also here to create changes beyond your daily life.
Our founder changed Danish legislation in 2021 by having the age limit on frozen eggs removed.
In 2025, we created the Red Flag campaign, which secured the Danish women's national handball team the right to wear dark shorts during the World Cup. And we will continue.

SAFETY AND SECURITY IMMEDIATELY AFTER

Despite the lack of legislation and safety requirements for menstrual products in the EU, we do not hesitate to take responsibility. We do not use PFAS, nanosilver - no magical "stay fresh" treatments of the absorbent layers. We third-party test our underwear for chemicals and use innovation without compromising your safety to solve odor problems.

PREMIUM PRODUCTION

We produce in Portugal, Denmark, Lithuania, and Turkey – and always with the best materials such as organic cotton, organic merino wool, and ECONYL®.

Our partners are the best in their respective fields, and several of our factories are GOTS-certified, which sets requirements for employee welfare.

BY THOSE WHO MENSTRUATE, FOR THOSE WHO MENSTRUATE

We create products we ourselves need - and test them thoroughly (so yes, they are tested with real menstrual blood). In addition, we have a test panel consisting of hardcore and dedicated members from our community who take the task seriously.


Sign up here.

MORE THAN PERIODS

We know. It's about much more than menstruation. It's about a changing body – throughout the cycle, month after month.

That's why we are redefining what 'period products' are beyond a practical solution. The highest-rated absorbent underwear, sure, but also care that supports you and your body throughout your entire cycle.
That is Flow Cycle Routine.

Everyday Bra - Scoop - Flow Intimates
Everyday Bra - Scoop - Flow Intimates

FAQ

Wie lange halten Menstruationsunterwäsche?

Die durchschnittliche Lebensdauer von Socken und Unterwäsche beträgt etwa 3 Jahre. Es handelt sich um Kleidungsstücke, die täglich getragen und benutzt werden.

Da wir dem Verband keine chemische Behandlung zuführen, geht keine Funktion verloren.

Wenn Sie Ihre Slips gut pflegen und sie gemäß den Anweisungen waschen, ist die Qualität Ihrer Menstruationsslips von uns so gut, dass Sie sie problemlos 3 Jahre oder sogar länger verwenden können.

Hier finden Sie Unser Leitfaden zur optimalen Pflege Ihrer Menstruationsunterwäsche.

Wie finde ich das passende Produkt für mich?

We have menstrual panties that fit different bodies - whether you prefer a low rise, mid rise or high rise fit.

The Period Flow Brief and Period Flow Shorts both have a high waist, which is loved by many for the feeling of a hug around the belly.

Period Flow Cheeky has a more sporty look but with a wide and soft elastic at the waist - it is mid-rise.

Then we also have the classic low-waisted fit , which is a super nice, basic menstrual panty if discretion under the panty hem is *your thing*.

How long can I use them at a time?

It depends on your flow and your cycle day - as well as the absorbency of the panties.

But changing your menstrual panties at least morning and night is good hygiene - think of your absorbent underwear just like pads and tampons. They need to be changed every now and then.

But unlike tampons, for example, you are not at risk of Toxic Shock Syndrome, as menstrual panties are a non-invasive menstrual product.