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100% Satisfaction Guarantee

We'll guide you and give you new underwear - 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 panties on the market!"

Buy 5 - save 20%

You can mix and match
to suit your needs.

We deserve better

Why choose period panties 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.

That was the beginning of Flow - the first menstrual panties on the Danish market.

Today, we make menstrual panties 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 good reasons why you'll love us

THE HEART IS ALWAYS FIRST

We are also here to create changes beyond your everyday life.
Our founder changed Danish legislation in 2021 by removing the age limit for frozen eggs.
In 2025, we created the Red Flag campaign, which ensured 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 shy away from our responsibility. We do not use PFAS, nano-silver - 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 address odor issues.

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 places demands on employee welfare.

BY PEOPLE WHO MENSTRUATE, FOR PEOPLE WHO MENSTRUATE

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


Sign up here.

MORE THAN MENSTRUATION

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

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

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

FAQ

How long do period panties last?

The expected lifespan of socks and underwear in general is approximately 3 years. These are items of clothing that wear out and are used every day.

Since we do not add chemical treatment to the pad, there is no function that degrades.

If you take good care of your panties and wash them according to the instructions, the quality of your period panties from us is so good that you can easily use them for 3 years or even longer.

Here you can find our guide on how to best care for your period panties.

How do I choose the best fit for me?

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.