period bikini – Bathe safely underneath period

One period bikini gives you the freedom to bathe, swim and enjoy the summer – even when you have period.

At flow you'll find menstrual bikinis with discrete built-in absorbent technology that protects against light to moderate bleeding. From the outside, they look like ordinary bikinis. Inside is hidden our 3-layer absorbent technology, so you can feel safe both in the water and on the beach.

Mix and match our bikini bottoms and bikini tops to create the set that best suits your style and body.

How does one work period bikini?

One period bikini has a discreet absorbent panel sewn directly into the bikini bottom.

The panel consists of three functional layers, which help protect during menstruation, while the bikini maintains its elegant expression and light comfort.

Our period bikinis are designed for light to moderate wear period. For heavier bleeding, we recommend combining with a menstrual cup or menstrual disc for extra security.

Designed to look like a regular bikini

The best period swimwear is what you don't think about.

That's why all our menstrual bikinis are sewn in exclusive Italian materials with 4-way stretch, which follow the body's movements, dry quickly and feel comfortable all day.

You can use your period bikini throughout the summer - even on days you don't have period.

That's why women choose flow

• period bikini with built-in 3-layer absorbent technology

• Protects wood light to moderate period

• Can be used throughout the cycle - also without period

• Quick-drying Italian quality materials

• Mix and match tops and bikini bottoms

• Made in Portugal

• Free of PFAS and biocides

• Available in sizes from 2XS to 3XL

Find it period bikini, that suits you

Our collection contains several different fits.

If you prefer a classic and feminine look, er Sara our iconic bikini briefs in nostalgic structured fabric. If you want more support and coverage, er Seat an obvious choice, while Ragnhild has an elegant tie and a timeless expression. For teenagers we have developed John, which gives young people the opportunity to bathe safely during menstruation.

All models are designed with the same absorbent technology – the difference is fit, style and expression.

Say yes to summer - also on the bleeding days

Too many people skip the beach, the pool or the swim because period.

At flow we believe that your cycle should not determine whether you jump into the sea, play beach volleyball or go on a beach holiday.

That's why we've developed period bikinis that give you the freedom to be exactly as active as you want - no matter where you are in your cycle.

Do you prefer a bathing suit? See our period swimwear.

Frequently asked questions

What is a period bikini?

One period bikini is a bikini with a discreet built-in absorbent panel, which makes it possible to swim underneath period with light to moderate bleeding.

Can you swim with one period bikini?

Yes. The menstrual bikini has been developed for use both in the water and on land, so you can bathe, swim and be active during your period.

Can I use the menstrual bikini without it? period?

Yes. All of our period bikinis work like regular bikinis and can be worn all summer – even when you're not period.

What if I bleed heavily?

Our period bikinis are designed for light to moderate wear period. For heavier bleeding, we recommend combining with a menstrual cup or menstrual disk.

How do I choose the right model?

All models have the same absorbent technology. The difference lies in the fit and design, so you can choose the bikini bottom that best suits your body and your preferences.

How do I wash my period bikini?

Rinse the bikini in cold water after use, wash it at 30-40 degrees without fabric softener and let it air dry to maintain the absorbent properties.