maillots de bain menstruels efficaces

Are period swimsuits really effective?

Written by: Camille Raynaud

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Time to read 7 min

Period swimwear, how does it work? Are they really effective and reliable at capturing and holding menstrual flow? How does period blood stay contained without dispersing in the water? It’s understandable to have serious doubts about the effectiveness of this kind of protection.

A period swimsuit that holds menstrual flow in the water without leaking? It’s normal to be skeptical! Yet period swimwear, just like period panties, is becoming more popular to our great delight!

Yes, there is a concrete alternative to menstrual cups and disposable tampons. Until now, those were the only hygienic options for swimming during your period. Louloucup, a French brand of washable and reusable menstrual products, explains how period swimsuits work and why it’s so useful to have one in your suitcase for your next vacation! (Yes, it really will save the day 😉)

Psst! In a rush and packing your suitcase for vacation? Check out our gorgeous, irresistible period swimwear now! 

Absorbent fabric & waterproof fabric: the key to period swimwear

The principle of menstrual swimsuits is quite simple to understand. It can be summarized as follows:

Inside the swimsuit, in contact with your intimate area, there is an absorbent fabric that captures menstrual flow. This technical fabric also ensures the wearer stays dry, so zero moisture and great comfort guaranteed!

Beneath this first fabric lies a highly absorbent membrane (the pad). This very absorbent fabric can hold and trap menstrual flow without swelling. Thus, menstrual swimsuits can store flow without changing shape. The period bikini doesn’t bulk up—no diaper effect!

Finally, to contain menstrual flow within the swimsuit, a waterproof and water-repellent fabric is sewn on the outside. This way, bath water doesn’t come into contact with the pad holding the blood. The flow remains neatly stored in the membrane without diluting into the water.

Thanks to this combination of different technical fabrics, there’s no risk of leaks or stains. The blood won’t dissolve into the pool water, and there’s no risk of stains on the lounger or bath towel.

The layering of the different fabrics stays very thin and very discreet. There’s no way anyone could tell you’re wearing period swimwear from the outside! No need to stress or worry about that – you can feel totally at ease!

A few words about Manon (our best-selling bikini bottom) 😎



  • Manon is a very simple, versatile and elegant bikini bottom.

  • Black and basic, it pairs easily with any bikini top.

  • Manon easily absorbs light to medium periods (equivalent to 2 or 3 tampons). If you have a heavy flow, we recommend wearing a cup along with Manon.

  • Manon is just as good at the beach as at the pool, in both chlorinated and salt water.

  • This period bikini bottom is available for teens and petite figures in size XXS (€22.90 – decreasing prices for bundles).

Discover the full collection of Louloucup period swimwear for light to medium flow at low prices (between €22.90 and €28.90 before bundle discounts) 😍

Period swimwear: which flows is it effective for?

In salt water or chlorinated water, on the beach or by the pool, today’s menstrual swimsuits available on the market are effective for light and medium flows.

A menstrual swimsuit can be worn:


  • By all women at the beginning or end of their menstrual period when flow is still light, or at any other time in the cycle when flow is lighter.

  • During pregnancy for expectant mothers who experience some harmless discharge and light bleeding.

  • For all women and teenagers who experience irregular periods, surprise periods or small unexpected irregular spotting (spotting).

Menstrual swimsuits can really "save the day" and allow you to enjoy, despite your period, an afternoon at the pool with friends or a swim in the sea with family without any problem.


Teenagers and women with a heavy flow are advised to wear internal protection such as a menstrual cup or tampon in addition to a period bikini. Medium flow, heavy flow, hemorrhagic flow, and lochia are not supported by current menstrual swimsuits.

Do you have heavy, even hemorrhagic periods? Do you use an IUD? Louloucup’s period panties for heavy to very heavy flow (priced between €22.90 and €33.90) have an absorption capacity equivalent to 5 tampons. Don’t hesitate to add some to your cart on your next order. Prices decrease with quantity. These models are perfect for long days or for sleeping without worrying about staining your sheets. They perfectly complement period swimwear. 

Menstrual swimsuits: protection that’s pretty, absorbent, and waterproof all at once

Menstrual swimsuits, just like period panties, don’t forget to be elegant and pretty. Feminine, trendy, high-waisted or one-piece, you now have a wide choice to fully enjoy the moment.

This key piece in your summer wardrobe is as pretty as it is comfortable. You feel good as soon as you slip on your period swimsuit. You can finally swim freely even on your period.

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Menstrual swimwear for every woman

For teens who don’t want to use internal protection like tampons or cups, for new moms who can’t (yet) use menstrual cups or tampons, and for all women seeking simple, safe protection (no risk of toxic shock, no dryness, no irritation), menstrual swimsuits are the solution!

Louloucup hasn’t forgotten teenagers! Discover all the teen period swimsuits (starting at €22.90 before bundle discounts) and build your pack for an optimized and ultra-comfortable period routine.

Spotlight on Louloucup’s range: menstrual bikinis for everyone!

So, interested in menstrual swimsuits? In addition to period panties and menstrual cups, Louloucup offers a great range of one-piece and two-piece menstrual swimsuits.

Discover without delay our 4 beautiful models suited for light to medium flows:


  • The Manon menstrual bikini bottom is a black bikini brief that’s super simple and very classic, matching with everything! Super practical! The real plus with this menstrual bikini bottom? Its teen version in size XXS. Yes, our teens need their own period swimwear too. At 12, 14, or older, find the ideal period swimsuit for her. Prices start at €22.90.

  • The Laura menstrual bikini bottom. Its highlight? The beautiful lace-up back and high waist to conceal a bloated belly during your period. Good to know: the Laura model is available up to size XXL. This bottom is very popular. Users feel secure while looking beautiful. Price €28.90 before discount.

  • The Juliette menstrual bikini bottom is the bikini version of one of the most popular organic cotton period panties among our users, the Naomi model, a black, sexy panty for medium flow. Its side lacing leaves no one indifferent. The classic black bikini bottom can be paired with any bikini top or sports bra. Price €28.90 before bundle discount.

  • The Noa one-piece menstrual swimsuit, elegant and timeless, is a must-have. This one-piece menstrual swimsuit is both reliable and classic. It features a plunging neckline and an integrated bra. Price €28.90 before discount.

In short.

Our range of menstrual swimwear is specially designed to offer optimal comfort while remaining elegant and feminine.
The cuts of our menstrual swimsuits are carefully designed to flatter your figure and make you feel beautiful and confident during your days at the beach or pool. 💦

Our period swimsuits are offered at competitive prices (between €22.90 and €28.90), with attractive offers to suit all budgets. Build your custom bundle with sliding scale pricing. Mix models, sizes, flows, and styles. Add panties, cups, and swimsuits—basically, do whatever you want! There are no limits. And you’ll notice (with joy) that the unit price of each product you selected has dropped. It’s automatic. It’s our way of thanking you for your trust.

By choosing one of our Louloucup period swimsuits, you’re guaranteed fast and free delivery in France and Europe. Your order is always shipped within 48 hours maximum. So don’t wait any longer and get equipped so your next period is comfortable, eco-friendly, and easy to manage.

Discover our period swimwear now!

FAQ - menstrual swimsuits

I have a heavy flow—can I wear a period swimsuit without worrying about leaks?

Unfortunately, at the moment, no period swimsuit can effectively hold a heavy or very heavy menstrual flow. Absorbent period bikinis are only suitable for light to medium menstrual flow. If you have a heavy flow, we recommend wearing a menstrual cup + a period swimsuit for leak-free swimming. That way, you’ll be well protected!

How do menstrual swimsuits manage not to leak and still be so effective?

It’s all thanks to their design and the different layers of technical fabrics. An inner layer that absorbs the flow, a middle membrane that captures and stores it, and a final waterproof outer layer that stops it from leaking out!

Menstrual swimsuits cost much more than tampons, so why should I choose this type of protection?

Menstrual swimwear, just like period panties, is washable, reusable period protection that comes at a certain price. It’s a significant investment. However, because you can reuse it many times over many years, period swimwear is a smart investment that quickly pays for itself! Menstrual swim bottoms help you save money despite costing more than a box of tampons. 

To learn more...

Louloucup

Camille

I’ve been writing for Louloucup for several years now, and I love chatting about everything from period panties to grandma’s remedies for easing period pain! Every week I share my favorites and inspirations with one goal in mind: finally experiencing calm, stress-free periods! 🩷

High-performing, effective, affordable, gorgeous and high-quality period swimsuits?