Period panties for heavy flow: leak-free protection
Louloucup period panties are designed for heavy, very heavy and hemorrhagic flows. They offer up to 12 hours of protection (up to 50 ml, the equivalent of 5 tampons), with a soft, breathable lining in GOTS-certified organic cotton.
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28€90
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25€90
5→
22€90
* Prix à partir de 28,90€ – remise automatique
Mix tailles & modèles
OEKO-TEX® Standard 100
Coton bio
Sans PFAS
Our technology has been ranked among the best period underwear of 2026 by the media outlet 20 Minutes.
Ultra-absorbent, leakproof protection
Our heavy-flow styles feature a double absorbent zone and extended coverage from front to back. They lock in blood effectively while keeping your skin dry, with no odour and no damp feeling. They’ve also been selected among the 5 best period panties of 2025 by Passeport Santé.
“The best underwear for very heavy periods. No leaks for a full day. My daughter has her life back, and so do I. They should be reimbursed by social security!” – Anna (Trustpilot review)
Also discover: Our period swimwear for swimming, our range designed for teens and our plus-size styles.
Ideal for night-time, postpartum and copper IUD users
Our panties are suitable for heavy periods, bleeding with a copper IUD and postpartum discharge. When lying down, the reinforced absorbent area provides reliable protection, even in case of very heavy flow.
Most of our collections are made in Portugal. Some specific designs that require particular technical expertise are produced in our partner workshops outside Europe. For all our products, we guarantee that our fabrics are OEKO-TEX Standard 100 certified and guaranteed PFAS-free, with no solvents or silver nanoparticles.
Which heavy-flow style should you choose?
- Mathilde: Our ultra-comfy, full-coverage shorty. Available from size XXS, it’s also a teen favourite for sports and school.
- Liv: Seamless technology, totally invisible under your clothes.
- Clara: An elegant high waist offering perfect support, highly appreciated in plus sizes (up to 5XL).
- Jade: An ultra-soft organic cotton style, recommended for postpartum or very heavy flow with an IUD.
Which heavy-flow style should you choose?
- Mathilde: Our ultra-comfy, full-coverage shorty. Available from size XXS, it’s also a teen favourite for sports and school.
- Liv: Seamless technology, totally invisible under your clothes.
- Clara: An elegant high waist offering perfect support, highly appreciated in plus sizes (up to 5XL).
- Jade: An ultra-soft organic cotton style, recommended for postpartum or very heavy flow with an IUD.
Frequently asked questions
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Which period panties are best for heavy or hemorrhagic flow?
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Are your styles suitable for teenagers?
Yes, absolutely. The Mathilde and Jade styles are available from size XXS (EU 32). They offer the same ultra-absorbent technology as our adult models, so you can get through school days or sports without worrying about leaks. The Simone heavy-flow period panty is also available from size 3XS, perfect for pre-teens!
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Can I build a custom bundle with different flows and styles?
Absolutely! At Louloucup, you can build your own custom box by mixing heavy-flow panties, lighter styles and even a period swimsuit. The more items you add, the lower the price per item!
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How long can you wear a Louloucup panty?
You can wear it for up to 12 hours at a time. Our wicking fabrics trap flow and moisture instantly, which prevents odours. For extremely heavy bleeding (over 70 ml), we recommend having a spare pair or using a Louloucup in addition.
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Where are your panties made?
Most of our collections are made in Portugal. For certain technical styles, we work with expert partner workshops located outside Europe. Our top priority is quality: 100% of our fabrics are OEKO-TEX 100 certified and guaranteed PFAS-free.
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How do I care for my panties so they last a long time?
It’s easy: rinse it in cold water after wearing it, then machine-wash at 30°C (short cycle, no fabric softener). Finally, let it air-dry. Avoid the tumble dryer to preserve the performance of the technical fibres.
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