Period thong
For light flow
For light flow
MATERIAL
MATERIAL
WASHING GUIDE
WASHING GUIDE 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.
HOW DO THEY WORK?
HOW DO THEY WORK? Flow menstrual panties are sewn with a built-in pad, consisting of 3 technical layers that guide fluid into the pad, absorb the fluid and ensure that you do not bleed or leak through.
👉 You can read much more about how absorbent panties work here.
Choose options
We deserve better
Why choose menstrual panties from Flow?
After two fertility treatments and two births, I no longer wanted to use menstrual products that went inside the body – I wanted to be able to bleed in peace.
That was the start 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
✔️ Various 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.
Best 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 bigger changes than just in your daily life.
Our founder changed Danish legislation in 2021 by having the age limit for frozen eggs removed.
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 hesitate to take responsibility. We do not use PFAS, nanosilver - no magical "stay fresh" treatments of the absorbent layers. We third-party test our period underwear for chemicals and use innovation without compromising your safety to address odour issues.
PREMIUM PRODUCTION
We produce in Portugal, Denmark, Lithuania, and Turkey – 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 requirements for employee welfare.
BY PEOPLE WHO MENSTRUATE, FOR PEOPLE 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.
MORE THAN MENSTRUATION
We know it. It's about much more than menstruation. It's about bodies changing - 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's Flow Cycle Routine.
Do you need help?
Frequently asked questions about low-absorbency panties
It depends 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.
Flow panties with low absorption are for everyday use.
They absorb fine discharge, spotting and small urine leaks. But the absorbent layers are thin and discreet.
👉 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.
Daily protection
Low-absorbency panties
Menstrual panties - g-string in soft lyocell
Menstrual panty - G-string, Everyday Flow Thong, is an absorbent G-string, developed for those who want discreet protection in everyday life. It combines a feminine, minimalist design with a discreet absorbent layer, so you get the feeling of regular underwear - with a little extra security.
Sewn in soft and breathable lyocell, it sits high on the hip and follows the body's movements with a light and comfortable fit.
An alternative to panty liners
Your panty liner has never looked like this.
Our menstrual panties like a g-string are designed for those days when you want a little extra protection – for discharge, light spotting, the beginning or end of menstruation or as an extra safety measure in everyday life.
The discreet absorbent layer is integrated directly into the panty, so you don't have to worry about loose panty liners and instead get a solution that looks and feels like regular underwear.
Soft lyocell with high comfort
Our menstrual panties like a g-string are made of soft lyocell, which feels comfortable against the skin and provides light and breathable comfort throughout the day.
The material is chosen for its soft quality and elegant fit, so the g-string is as comfortable as it is discreet.
That's why many people choose menstrual panties as a G-string
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Absorbent g-string with discreet protection
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A comfortable alternative to panty liners
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Suitable for vaginal discharge and light spotting
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Can be used before and after menstruation
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Sewn in soft and breathable lyocell
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Light, feminine and almost invisible under clothes
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Feels like regular underwear
Match with Everyday Bra Plunge
Create a complete set with the Everyday Bra Plunge, which is developed in the same soft quality and with the same simple, Scandinavian design.
Together they create a comfortable everyday set with a focus on both function and aesthetics.
Frequently asked questions
What can Menstrual Panties - G-string be used for?
Menstrual panties - G-strings or Everyday Flow Thong are developed for everyday use and are suitable for vaginal discharge, light spotting, the beginning or end of menstruation, and as extra security during the day.
Is it an alternative to panty liners?
Yes. The discreet absorbent layer makes Everyday Flow Thong a comfortable alternative to disposable panty liners in many situations.
Can I use it during menstruation?
Yes, for very light periods or spotting. For heavier bleeding, we recommend one of our menstrual panties with higher absorbency.
Can you see the absorbent layer?
No. The absorbent layer is integrated into the panty and is not visible from the outside. Everyday Flow Thong looks and feels like a regular G-string.
What material are the panties made of?
Everyday Flow Thong is sewn from soft and breathable lyocell, which provides a light and comfortable feel against the skin.
Which bra is suitable?
The Everyday Flow Thong is designed to match the Everyday Bra Plunge, so you can create a complete and comfortable underwear set.
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