



High-waisted period shorts
Loved by +25,000 women
Rinse - wash - wear - repeat
1. If you have soaked your panties, rinse them in cold water until it runs clear.
2. Protect your panties in a laundry bag and wash your panties with similar colors at 30-30 degrees.
Tip: You can wash with it to your advantage our Allergy Certified special detergent Bloody Clean.
3. Dry them inside out on a clothesline - and you're good to go again.
👉 Read the whole our guide to how to take good care of your panties here.
flow period underwear is sewn with a built-in bandage, consisting of a minimum of 3 technical layers, which directs liquid down into the bandage, absorbs the liquid and ensures that you do not bleed or drip through.
Absorption corresponds to approx. to:
Light flow: 2-5 mL
Moderate flow: 5-10 mL
Heavy flow: 10-15 mL
👉You can read much more about how absorbent panties work here.
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"De bedste trusser på markedet!"

We deserve better
Why choose period underwear from flow
After two fertility cycles and two births, I no longer wanted to use menstrual products that had to enter the body - I wanted to be able to bleed in peace.
That was the start of it flow - the first ones 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 environmentally friendly alternative to disposable products
Our mission is to do period more free, safe and less cumbersome — without compromising on style or function.
Kind regards, Cathrine
What we are most proud of
5 good reasons why you will love us
Heart always first
We are also here to create bigger changes than just in your everyday life.
Our founder has changed Danish legislation in 2021 by removing the age limit on 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 WC. And we keep going.
Safety and security right after
Despite the lack of legislation and safety requirements for menstrual products in the EU, we do not hesitate in our responsibility. We do not use PFAS, nanosilver - no magical "stay fresh" treatments of the absorbent layers. We third party test our panties for chemistry and wear innovation without compromising your safety to solve odor nuisances.
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 care.
By menstruating for menstruating
We create products we ourselves lack - 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.
More than period
We know it well. It is about much more than that period. It's about the body in change - throughout the cycle, month after month.
That is why we are redefining what 'while products' are in addition to being a practical solution. The best rated absorbent underwear of course, but also care that supports you and your body throughout the cycle.
It is flow Cycle Routine.
Do you need help?
Frequently asked questions about period underwear
It may depend on the materials your panty is made of.
Mesh is very stretchy and if you are between two sizes, we would suggest sizing down.
Lyocell and organic cotton are slightly firmer materials, and here we would suggest that you take your normal size.
It depends on the absorbency of the panties, which is indicated by drops. We have period underwear for both moderate and heavy bleeding.
If you are bleeding very heavily, you can use your panties together with a menstrual cup or disc.
We also have absorbent panties with low absorbency for everyday use.
👉If you need more absorption, you can choose period underwear instead.
At the bottom of the panty is a discreet strip of fabric sewn in.
Regardless of the style, the bandage consists of a minimum of 3 absorbent layers - a top layer, which guides the liquid down into the next layer, which is reminiscent of a towel. At the bottom you will find a membrane which ensures that the liquid does not pass through the panty.
👉Read more in our guide to period underwear.
Rinse - wash - wear - repeat
1. If your panties are soaked, rinse them in cold water until it runs clear.
2. Protect your panties in a laundry bag and wash your panties with similar colors at 30-30 degrees.
Tip: You can wash with it to your advantage our Allergy Certified special detergent Bloody Clean.
3. Dry them inside out on a clothesline - and you're good to go again.
👉 Read the whole our guide to how to take good care of your panties here.
If you go all-in on absorbent panties and replace all panty liners and pads, you'll need 10-12 pairs - depending on how easy you have access to a washing machine.
But do you only use absorbent panties only for yours period, then we suggest 5-7 pairs.
The more panties, the easier everyday life.
That's why we also offer bundle discounts on several pairs.
"Leakage" is not really a word we think is so delicious in the context of the body.
It sounds more like a leaking engine.
But you don't bleed directly through your panties. If they have reached their 'max' on capacity, then you bleed out to the sides.
You can believe they are!
The Consumer Council Tænk has put a lot of focus on period underwear in 2022, and their experts also approve of the method:
1) Rinse in cold water.
2) Wash at 40 degrees.
3) Air dry on a string.
👉 Read the whole our guide to how to take good care of your panties here.
period shorts with a high waist - for the night and strong period
period shorts with high waist, also called Period flow Shorts, are our most covering period shorts - developed for you who want maximum security on the heaviest menstrual days, at night or in the time after giving birth.
The soft shorts are sewn in organic cotton and have a small leg that stays put all night. Together with our longest and widest absorbent panel, they provide extra protection when you need it most.
It is therefore no coincidence that Period flow Shorts are among our best rated models.
Sleep safely during menstruation
Many people find that night is the time when they worry the most about bleeding.
That is why we have developed our period shorts with an extra long and wide absorbent layer, which provides greater coverage both in front and behind. The high waist and short legs help the shorts stay put, even when you toss and turn in your sleep.
The result is period underwear for the night, which allows you to sleep with greater peace of mind.
Developed for powerful period and postpartum
Period flow High-waisted shorts are made for the powerful period and can also be a comfortable choice in the postpartum period, when many want soft and covering underwear.
Do you have very strong period, you can combine the shorts with a menstrual cup or menstrual disk for extra protection on the heaviest bleeding days.
Soft organic cotton with maximum comfort
The shorts are made of soft organic cotton, which feels comfortable against the skin and provides natural, breathable comfort.
The distinctive curved signature seams accentuate the body's shapes, while the small leg provides extra coverage without feeling heavy or bulky.
That is why many choose Period flow Shorts
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period shorts to strong period
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Ideal as period underwear until the night
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Extra long and wide absorbent panel
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High waist and short legs that stay put
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Made of soft organic cotton
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Suitable in the postpartum period
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Produced in Portugal
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Free of PFAS and biocides
Created for those days when you need a little extra
Some days call for more comfort, more coverage and more security.
Period flow Shorts have been developed for just those days. For the first nights with heavy period. For postpartum. Or when you just want to feel completely calm - day and night.
Frequently asked questions
Is Period flow Shorts good for sleeping in?
Yes. The shorts have been developed with an extra long and wide absorbent panel, high waist and short legs that stay put at night. That is why they are particularly popular as period underwear until the night so you can feel safe.
How powerful period can they be used for?
Period flow Shorts are developed for strong period. If you have very heavy bleeding, we recommend combining them with a menstrual cup or menstrual disc for extra protection.
Can they be used after a birth?
Yes. Many choose Period flow Postpartum shorts, because they have built-in protection, provide soft comfort and a comfortable fit.
Why do the shorts have legs?
The short legs help the shorts stay in place and provide extra coverage that prevents leaks, which many find an advantage - especially at night and in heavy period.
Are they warm to wear?
No. The shorts are made of soft organic cotton, which feels comfortable and breathable against the skin.
How do I wash? period shorts?
Rinse the panties in cold water after use, wash them at the recommended temperature without fabric softener, and let them air dry. Then they retain their absorbent properties best.


Material
Washing guide
How does it work period underwear