MATERIAL
MATERIAL
WASHING GUIDE
WASHING GUIDERinse - wash - wear - repeat
1. If you've bled in your period panties, rinse them in cold water until the water runs clear.
2. Protect your period panties in a laundry bag and wash them with similar colors at 30-40 degrees.
Tip: You can also wash them with our Allergy Certified special detergent Bloody Clean.
3. Dry them inside out on a clothesline - and you're good to go again.
👉 Read our full guide on how to care for your period panties here.
HOW DO PERIOD PANTS WORK?
HOW DO PERIOD PANTS WORK?Flow menstrual panties are sewn with an integrated pad, consisting of at least 3 technical layers, which draw fluid into the pad, absorb the fluid, and ensure that you don't bleed or leak through.
Absorption roughly corresponds 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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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.
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 absorption levels
✔️ Comfort like regular underwear
✔️ A more environmentally friendly alternative to disposable products
Our mission is to make menstruation more free, secure, and less cumbersome – without compromising on style or function.
Warm regards, Cathrine
What we are most proud of
5 good reasons why you'll love us
HEART ALWAYS FIRST
We are also here to create greater changes than just in your daily life.
Our founder changed Danish legislation in 2021 by removing the age limit on frozen eggs.
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 on the absorbent layers. We third-party test our panties 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 using 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 standards for employee welfare.
BY PEOPLE WHO MENSTRUATE, FOR PEOPLE WHO MENSTRUATE
We create products that we ourselves need – and we 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 MENSTRUATION
We know it. It's about much more than menstruation. It's about a body in change – 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 your entire cycle.
That is Flow Cycle Routine.
Do you need help?
Frequently asked questions about menstrual panties
It may depend on the materials your panties are 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 menstrual panties 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 menstrual panties instead.
A discreet fabric band is sewn into the bottom of the panties.
Regardless of the style, the pad consists of a minimum of 3 absorbent layers - a top layer that conducts the liquid down into the next layer, which is similar to a towel. At the bottom you will find a membrane that ensures that the liquid does not pass through the panty.
👉 Read more in our guide to menstrual panties.
Rinse - wash - wear - repeat
1. If you have spotting in your panties, rinse them in cold water until the water 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 our Allergy Certified special detergent Bloody Clean .
3. Dry them inside out on a clothesline - and you're good to go again.
👉 Read our full guide on 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 will need 10-12 pairs - depending on how easy you have access to a washing machine.
But if you only use absorbent panties for your period, we suggest 5-7 pairs.
The more panties, the easier everyday life.
That's why we also offer bundle discounts on multiple pairs.
"Leak" isn't really a word we find 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' capacity, you bleed out to the sides.
You can believe they are!
The Danish Consumer Council Think has put a big focus on menstrual panties in 2022, and their experts also say good things about the method:
1) Rinse in cold water.
2) Wash at 40 degrees.
3) Air dry on a line.
👉 Read our full guide on how to take good care of your panties here.
Others also viewed
period underwear with high waist
period underwear with high waist, Period flow Brief – High Ris,e is our bestseller – now reimagined in ultra-soft organic cotton. The high-waisted period underwear combines maximum comfort with our latest absorbent technology and is developed for those who want security throughout their period.
The high waist hugs the stomach with soft elastic, while the curved seams accentuate the body's natural curves. The result is period underwearthat feel as comfortable as they look.
Our softest period underwear to date
Soft Collection is developed with a focus on comfort. That's why this model is sewn from soft organic cotton, which feels comfortable against the skin and provides natural, breathable comfort throughout the day.
We have also redesigned the absorbent layers and reduced the amount of polyester, making the panties even more breathable – without compromising on the protection you know from flow.
To strong period – also at night
These period underwear with high waist is developed for strong period and has our longest absorbent panel, which provides extra security – both day and night.
Many people choose this model as nightwear because the high waist and long absorbent gusset provide a comfortable and secure feeling when you sleep.
Do you have very strong period, you can combine the panties with a menstrual cup or menstrual disc on the heaviest bleeding days.
Color: Dusty pink
You'll love this delicate pink color, which is just as dusty as the name suggests. It's nice and light under your clothes, a super feminine shade but still discreet.
What size should I take?
Cotton is a stretchy material, so to ensure the panties fit properly, take your regular size - or go down a size, especially if you are between sizes.
That's why so many people choose high waisted
A high waist isn't just about fit.
Many describe the feeling as a soft hug around the stomach – exactly the comfort you might want when your body is working a little extra during your period.
The high waist stays where it needs to be, without rolling down, and provides a flattering silhouette under clothing.
Why customers love Period flow Brief – High Rise
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period underwear with high waist in soft organic cotton
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Developed for powerful period
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New, more breathable absorbent technology
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Reduced polyester in the absorbent layers
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Long absorbent wedge – ideal for the night
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Soft elastic that feels comfortable against the stomach
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Free from PFAS and biocides
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Can be washed and used again and again
Match with the rest of the Soft Collection
Create a complete set with Everyday Bra Scoop in the same ultra-soft organic cotton.
The Soft Collection is developed with the same philosophy in all styles: uncompromising comfort, timeless design and materials you want to wear – every single day of your cycle.
Frequently asked questions
Who is suitable? period underwear with a high waist?
High Rise is suitable for anyone who wants a high-waisted fit with extra comfort around the stomach. Many prefer the model below periodbecause the high waist gives a comfortable and enveloping feeling.
How powerful period Can the panties handle it?
Period flow Brief – High Rise is designed for heavy period and has our longest absorbent panel. If you have very heavy bleeding, you can combine the panties with a menstrual cup or menstrual disc for extra protection.
Can I sleep with my menstrual panties on?
Yes. The long absorbent gusset and high waist make the model particularly suitable as period underwear at night.
What is the difference between the Soft Collection and the original High Rise?
The Soft Collection is made from ultra-soft organic cotton and features our new, more breathable absorbent technology with reduced polyester in the absorbent layers. The fit is inspired by our bestseller, but the comfort is taken to another level.
Are the menstrual panties free of PFAS?
Yes. All our period underwear is free of PFAS and biocides.
How do I wash mine? period underwear?
Rinse them in cold water after use, wash them at the recommended temperature, and avoid fabric softener to maintain their absorbent properties. Let them air dry.
How many pairs period underwear Do I need?
Most people enjoy 3-5 pairs, so there is always a clean pair ready between washes. That's why we offer volume discounts when you buy more.
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