Care & accessories for menstrual panties - washing and storage
We deserve better
Why choose period underwear 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 menstrual underwear on the Danish market.
Today, we make menstrual 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 freer, safer, and less complicated - without compromising on style or function.
Sincerely, Cathrine
What we are most proud of
5 great reasons why you'll love us
THE HEART ALWAYS COMES FIRST
We are also here to create changes beyond your daily life.
Our founder changed Danish legislation in 2021 by having the age limit on frozen eggs removed.
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 of the absorbent layers. We third-party test our underwear for chemicals and use innovation without compromising your safety to solve odor problems.
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 welfare.
BY THOSE WHO MENSTRUATE, FOR THOSE 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 PERIODS
We know. It's about much more than menstruation. It's about a changing body – throughout the cycle, month after month.
That's why we are redefining what 'period products' are beyond a practical solution. The highest-rated absorbent underwear, sure, but also care that supports you and your body throughout your entire cycle.
That is Flow Cycle Routine.
FAQ
How long do period panties last?
The general expectation for the lifespan of socks and underwear is approximately 3 years. These are items of clothing that wear out and are used every day.
Since we do not add chemical treatments to the pad, there is no function that deteriorates.
If you take good care of your period underwear and wash them according to the instructions, the quality of our period underwear is so good that you can easily use them for 3 years or even longer.
Here you will find our guide on how to best care for your period underwear.
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.
Care & accessories for menstrual panties - washing and storage
Care and accessories for menstrual panties can make the experience with your menstrual panties even easier.
At Flow you will find accessories that are designed to make washing, storing and transporting your menstrual panties easier and more practical. From gentle detergent to smart wet bags – everything is created with the same focus on quality and function as the rest of the Flow universe.
See the full range of menstrual panties here.
Care that extends life
Menstrual panties last the longest when they are washed correctly.
That's why we have developed Bloody Clean, a detergent created for gentle washing of menstrual panties and absorbent underwear. Proper care helps maintain the absorbency and keeps your panties fresh wash after wash.
The detergent was developed together with Byoms - and it is Allergy Certified.
Smart storage on the go
With a Flow Wetbag You can easily store both clean and used menstrual panties when you are at work, at school, on vacation or at the gym.
The water-repellent interior helps keep moisture inside the bag, while the drawstring closure makes it easy to hang or carry in your bag.
Why customers choose our accessories
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Accessories designed for menstrual panties
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Bloody Clean – gentle detergent
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Flow Wetbag for storage and transport
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Make everyday life easier with menstrual panties
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Developed with a focus on function and durability
Take good care of your menstrual panties
With proper care, your menstrual panties can stay comfortable and functional for a long time.
That's why we've collected the products that make it easy to take good care of your Flow favorites - both at home and on the go.
Frequently asked questions
What accessories do I need for menstrual panties?
Most people can get by with a gentle detergent and a wet bag. This makes it easier to wash, store and transport menstrual panties.
What is Bloody Clean?
Bloody Clean is a detergent developed for gentle washing of menstrual panties and absorbent underwear. It helps to preserve the absorbent properties of the materials.
What is a wet bag?
A wetbag is a bag with a water-repellent interior that can be used to store used or clean menstrual panties, swimwear or other damp textiles.
Can I use a wet bag for something other than menstrual panties?
Yes. Many people also use wet bags for wet swimwear, workout clothes, sanitary pads or children's changes of clothes.
How do I wash a wet bag?
The Wetbag can be wiped with a damp cloth on a daily basis and washed in the washing machine as needed at 30 degrees. Always follow the washing instructions on the product.
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