High-waisted period shorts
Loved by +25,000 women
Material
Material
Washing guide
Washing guideRinse - 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.
How does it work period underwear
How does it work period underwearflow 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 to strong period – for both night and day
Our new Period flow Shorts from the Soft Collection are our most covering period underwear for heavy bleeding. They are developed to be powerful period, at night and on the days when you want extra protection and want to feel safe - both day and night.
The shorts are sewn from soft organic cotton and have a high waist, short legs and our longest and widest absorbent layer. The high absorption makes them particularly suitable for the heaviest days of the period.
Sleep safely during menstruation
The night can be the time when the concern about bleeding through is the most. Therefore, Period has flow Shorts an extra long and wide absorbent layer that provides greater coverage both front and back.
The high waist and short legs help the shorts stay put, even when you toss and turn in your sleep. The result is soft period underwear, which has been developed to provide extra protection and let you feel safe through the night.
period shorts to strong period
Period flow Shorts are developed for heavy bleeding and have high absorption for the days when your flow is largest. The absorbent layers catch menstrual blood and help keep you dry.
How long you can use yours period shorts, depends on your individual flow and the absorbency in relation to your bleeding. For some, they will be able to be used all day, while others with very strong period need to change more often.
If you have very heavy bleeding, you can combine the shorts with a menstrual cup or menstrual disk for extra protection.
Soft organic cotton from the Soft Collection
Period flow The shorts are made of soft organic cotton, which feels comfortable and breathable against the skin.
The curved signature seams follow the shape of the body, while the small leg provides extra coverage without feeling heavy or bulky. A couple period shorts created for comfort day and night - when you need a little more peace around you period.
Comfort in the postpartum period
After giving birth, many people want soft, high-waisted and covering underwear. Period flow Shorts can be a comfortable choice in the postpartum period with their soft cotton, high waist and long absorbent layers.
Always follow the recommendations of your midwife or doctor about hygiene and changing frequency after birth.
That is why many choose Period flow Shorts
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period shorts to strong period
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period underwear for heavy bleeding
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High absorption for the heaviest days of menstruation
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Extra long and wide absorbent layer
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Extra protection front and back
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High waist and short legs that help the shorts stay put
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Soft organic cotton
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Suitable day and night
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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
How to wash yours period shorts
Rinse the shorts in cold water after use. Then wash them at the recommended temperature without fabric softener and let them air dry. It helps to maintain absorbency for as long as possible.
Always follow the washing instructions in the product.
Frequently asked questions
Can period shorts used when strong period?
Yes. Period flow Shorts are developed as period underwear for heavy bleeding. They have high absorption and an extra long and wide absorbent layer that provides extra protection on the heaviest days of the period.
Can I use Period flow Shorts all day?
It depends on your individual flow. By strong period some may use the shorts all day, while others will need to change earlier. Learn your own flow and the absorbency of the shorts, and change when it feels necessary.
Is Period flow Shorts good to sleep in?
Yes. The long absorbent layer, high waist and short legs are designed to provide good coverage and help you feel secure through the night. Therefore, the model is particularly suitable as period underwear until the night.
What do I do in case of heavy bleeding?
In case of very heavy bleeding, Period flow Shorts are combined with a menstrual cup or menstrual disk for extra protection. How often you should change depends on your individual flow.
What do I do in case of prolonged and heavy bleeding?
period underwear can help manage the bleeding itself but does not treat the cause. Do you experience prolonged and heavy bleeding or a significant change in your period, you should talk to your doctor.
May Period flow Shorts worn day and night?
Yes. Period flow Shorts can be used both day and night. The high absorption makes them particularly suitable for the heaviest menstrual days and for the night, when many want extra coverage.
May Period flow Shorts used after a birth?
Yes. They can be a soft and covering choice in the postpartum period. Follow the recommendations of your midwife or doctor about hygiene and changing frequency after birth.
How do I wash? period shorts?
Rinse them in cold water after use, wash them at the recommended temperature without fabric softener, and let them air dry. Always follow the product's washing instructions.
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