Which is the best period underwear?
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Time to read 8 min
Looking for the best period underwear? Of course—you want reliable, long-lasting, comfortable, affordable, and effective protection to replace wasteful disposable pads and tampons!
Depending on your body, your period, your flow, your shape, your habits, and your needs, the models vary. Louloucup, a French brand of menstrual products offering the best quality/price ratio, is here to help you find the best period underwear for you.
Organic cotton lingerie without pesticides, a PFAS-free period underwear, beautiful feminine pieces in lace or seamless styles, for sports, work, or relaxing at home? Leak-proof, odor-resistant, for light, medium, heavy, or very heavy flow—finally find your perfect protection!
No more compromises: reinvent your period with protection that adapts to you, no matter what.
In this article
How do you find YOUR perfect period underwear? 1. Flow: the foundation for flawless protection Best medium-flow period underwear 2. Comfort: because you deserve to feel good during your period Best menstrual underwear for light flow 3. Style and use: the right underwear for every moment of your life Best period underwear for heavy flow Our Louloucup selection: the perfect period underwear for every need For very heavy flows and peaceful nights: the Clara underwear For sports and ultimate discretion: the Liv panty For heavy flows with a touch of glamour: the Mathilde shorty For everyday use and medium flows: the Naomi underwear More than just underwear: a healthy, cost-effective, and eco-friendly choice A loving gesture for your body: the healthy composition of our underwear Best period panties for very heavy flow A revolution for your wallet: the savings you make A positive impact on the planet: the eco-friendly alternative FAQ: the best menstrual underwear Learn more The best period underwear for you?
How do you find YOUR perfect period underwear?
Every body is unique, every period, every woman. Choosing your perfect or ideal period underwear depends on key factors. Louloucup offers models tailored to your specific needs, combining comfort, protection, use, and style. Discover the 3 essential criteria for making an informed choice.
1. Flow: the foundation for flawless protection
Did you know your flow can vary from 20 ml to 80 ml per cycle? Menstrual flow simply refers to the amount of discharge you experience during your period.
Your choice of washable period lingerie depends a lot on the type and intensity of your period and flow. Louloucup offers styles suited to every kind of flow:
Light flow period underwear: up to 20 ml, ideal as a replacement for pantyliners or light pads.
Period underwear for medium flow: holds 40 to 50 ml, requires medium-protection underwear.
Period underwear for heavy and very heavy flow: up to 80 ml, requires ultra-absorbent underwear (equivalent to 5 tampons).
Louloucup panties offer up to 12 hours of protection thanks to integrated leak-proof and odor-control technology.
Did you know? Louloucup offers special collections for different needs. There’s a teen period underwear line (with models in size XXS), a postpartum collection (for new moms after childbirth), and a plus-size range (with sizes from XL to 5XL).
Best medium-flow period underwear
2. Comfort: because you deserve to feel good during your period
Comfort relies on two pillars: the materials and the cut of your lingerie. Louloucup uses OEKO-TEX Standard 100 certified organic cotton, free from harmful substances, to protect your intimate flora and ensure softness. This guarantees breathable, hypoallergenic protection without irritation.
Another important element to ensure the best fit: the cut. At Louloucup, we put a lot of thought into designing well-fitting styles. The goal? To make you feel truly comfortable. Our different models don’t dig in, itch, or cut into your curves. They adapt to your body and shape. Did you know? For our plus-size range, we took our favorite styles and completely reworked and redesigned them for the perfect fit. At Louloucup, quality comes first!
When it comes to fit, here’s our advice:
High-waisted styles are ideal for abdominal support and a slimming effect. This is especially helpful and appreciated during your period, when bloating is common. High or mid-rise styles provide coverage and security. They also expand the absorbent area.
The classic cut is the perfect balance between discretion and coverage.
The tanga cut is a reminder that you can feel feminine and sexy—even on your period!
Best menstrual underwear for light flow
3. Style and use: the right underwear for every moment of your life
Gone are the days when period panties were functional but not very stylish! Louloucup doesn’t choose between design and performance:
Lace and elegance, to feel beautiful every day.
Sports styles with seamless cuts and breathable fabrics for physical activity.
Wider absorbent zones for worry-free sleep.
Tangas, bloomers, boyshorts, and more traditional panties.
Best period underwear for heavy flow
Our Louloucup selection: the perfect period underwear for every need
| Model | Ideal for | Style/Cut | The Louloucup advantage |
| Clara | Very heavy to hemorrhagic flow / Night |
High-waisted shaping with lace |
The absorption champion for absolute security—voted best period underwear of 2025 by 20 Minutes. |
| Liv | Very heavy flow |
Seamless |
Perfect invisibility and comfort for sports and fitted outfits |
| Mathilde | Heavy flow |
Elegant shorty |
The perfect blend of elegant lace and high absorbency |
| Naomi | Medium flow |
Solid black underwear with beautiful lacing |
The everyday period panty: cute, reliable, and sexy |
For very heavy flows and peaceful nights: the Clara underwear
Designed for very heavy or hemorrhagic flow, these high-waisted panties offer absolute security thanks to their absorption capacity equivalent to 5 tampons. The ultra-absorbent zone extends high at the front and back, preventing leaks even while lying down.
Oeko-Tex certified organic cotton fabric provides unmatched comfort, with no dampness or unpleasant odors. Despite its high absorbency, it stays thin under clothes, with no "diaper" effect.
You can sleep soundly thanks to its double absorption zone. Clara is your best friend for the heaviest flows.
For sports and ultimate discretion: the Liv panty
Seamless by design, the Liv period underwear fits perfectly under the tightest outfits, without leaving marks or restricting your movement.
With an absorption capacity equal to 5 tampons, it efficiently holds very heavy flows without swelling or feeling wet. Its technical fabrics provide up to 12 hours of continuous protection.
Yoga, running, or Pilates—Liv gives you total freedom of movement. No more worrying about leaks during your workout.
For heavy flows with a touch of glamour: the Mathilde shorty
The Mathilde shorty combines elegance and protection. This design features lace details that enhance your figure while providing optimal protection. We especially love its high waist.
Its full-coverage shape offers reassuring comfort with an absorbency equivalent to 5 tampons. It keeps you confident through most of your cycle.
For everyday use and medium flows: the Naomi underwear
Naomi is one of our very first models. And one of the most popular (Over 90 positive reviews and a 4.9/5 rating). Solid black color, sophisticated yet simple design, little lacing on the hips, Naomi is sexy but discreet, comfortable (always lined with certified organic cotton inside), and has incredible charm.
It can absorb the equivalent of 2 to 3 tampons. Available in sizes XS to 3XL.
More than just underwear: a healthy, cost-effective, and eco-friendly choice
Louloucup period underwear is a real and sincere commitment to both the planet and your health. They’re perfect for replacing disposable pads and tampons. Combining comfort, savings, and environmental protection, they offer an innovative alternative to single-use products.
A healthy choice for your body: Made from OEKO-TEX Standard 100 certified organic cotton, they eliminate the risks of endocrine disruptors and dioxins found in some disposable products. Their triple-layer design (wicking, absorbent, waterproof) provides optimal protection without compromising your health. Loulou products are guaranteed free from forever chemicals (PFAS, PFAO), and contain no toxic or harmful substances.
A gesture for the planet: On average, a woman throws away 150 kg of disposable period products. With a lifespan of over 5 years, each Louloucup panty prevents hundreds of tampons or pads from ending up in landfills, where they take 500 to 800 years to decompose. Made without plastic, they help reduce microplastic pollution in the oceans. It’s practical and easy to adopt. #zerowaste
A smart choice for your budget: with our multipacks or bundles at sliding prices, you always win. The price of a single pair of panties at €28.90 keeps dropping as you add more products to your cart. It’s simple—the more items you add (any product from the Louloucup shop), the more you save. With 5 items of your choice in your cart, you save over €30—the equivalent of a menstrual panty. Plus, shipping is always free with Louloucup. Look out for sales and promo codes—they’re often available. That’s another great way to save on your order. Shipping is free, but please note that returns are at your expense.
A loving gesture for your body: the healthy composition of our underwear
Louloucup models combine organic cotton and innovative technology. Their inner layer of GOTS-certified soft cotton prevents irritation, the middle layer absorbs the equivalent of 5 tampons, and the waterproof membrane in PUL or TPU offers maximum security.
These OEKO-TEX Standard 100 certified materials eliminate the risk of contact with harmful substances, unlike disposable products that may release dioxins or PFAS.
At Louloucup:
No PFAS detected (LC-MS/MS analysis according to CEN/TS 15968 – detection threshold: 0.025 mg/kg).
No trace of toxic solvents or controversial substances like DMF, benzene, NMP, or triclosan.
No nonylphenol, octylphenol, or ethoxylates detected,
No fluorinated waterproofing or water-repellent treatments of any kind.
Best period panties for very heavy flow
A revolution for your wallet: the savings you make
By choosing period underwear, you’ll save a lot of money. Buying period underwear is a real investment that pays for itself within a few months. No more trips to the store every month for tampons and pads.
A positive impact on the planet: the eco-friendly alternative
The 45 billion disposable products produced worldwide each year cause major pollution. In France, the reduced VAT has lowered costs but not the ecological footprint. Louloucup underwear helps reduce the 20 billion pieces of waste thrown away annually in North America. Their organic cotton design lowers water usage, preserving natural resources and avoiding microplastics.
Key takeaway: The ideal period underwear matches your flow, comfort, and lifestyle. Louloucup offers organic cotton leak-proof models that provide up to 12 hours of protection, combining daily comfort, long-term savings, and eco-friendliness thanks to years of reuse.
FAQ: the best menstrual underwear
What’s the best Louloucup period underwear?
Clara was voted best period underwear in 2025. With its high waist, double protection, and stylish design, it has it all!
Which period underwear is the most effective?
For optimal effectiveness, choose models that match your flow first and foremost. Louloucup panties like Clara (very heavy flow/night) or Liv (seamless for sports) combine high absorption (equivalent to 5 tampons) and OEKO-TEX certified materials. Their three-layer technology (wicking, absorbent, waterproof) guarantees up to 12 hours of leak-proof and odor-resistant protection.
What’s the best period underwear for a medium flow?
Margot, Ella, Lucie, Gaby, Rebecca—you have options! We really love the Naomi model for its gorgeous design, comfort, and absorbency.
What’s the best period panty for a light flow?
Mia won’t let you down! Black lace, delicacy, femininity—she’s perfect for keeping you dry and skipping panty liners.
What’s the best period underwear for a teenager?
Lucie or Liv each have a teen version available in XXS!
Learn more
The best period underwear for you?
