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Best Menstrual Panties: Louloucup for Every Flow

⭐️⭐️⭐️⭐️⭐️ + 50,000 happy customers

Our customers recommend us 4.5/5 based on 2594 verified reviews
+2594 independently collected positive reviews

Our period panties, swimsuits and menstrual cups are designed for your comfort, your body and the planet.
Made from certified organic cotton or medical-grade silicone, they’re washable, ethical and suitable for all flows. Tested by an independent laboratory, with no detectable PFAS and no harmful substances. Discover our period products.

Our period panties, swimsuits and menstrual cups are designed for your comfort, your body and the planet.
Made from certified organic cotton or medical-grade silicone, they’re washable, ethical and suitable for all flows. Tested by an independent laboratory, with no detectable PFAS and no harmful substances. Discover our period products.

OEKO-TEX® Class II certified

Certified OEKO-TEX 100

Maximum absorbency

Inner layer in organic cotton

Designed in France since 2017

Cup made in France

Products tested – 0 PFAS

Products tested – 0 PFAS

Your satisfaction is our priority

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The Best Menstrual Panties According to the Press

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Louloucup, what is it?

Louloucup is a French brand, committed and attentive to women, teenagers, and their bodies. Our period underwear is designed to support your cycle with softness and peace of mind.

Made from GOTS-certified organic cotton and OEKO-TEX materials, they offer a healthy, high-performance and comfortable alternative to conventional menstrual products.

Our washable period lingerie is suitable for all flows (including heavy flow), all body types, and all women: teenagers, those in the postpartum period, or anyone looking for plus-size styles.

Discover the Loulou universe now and choose the period underwear that will support you every month, while respecting your body and the planet.

What our customers say

4.5/5 · 2,576 verified reviews across our full range

  • ★★★★★

    Vilma C. — Liv

    “Honestly, I’m blown away. I have a very, very heavy flow, and even after going to the bathroom you stay dry — none of that damp feeling. And in the heat it’s genuinely light. I love it so much I ordered a second one. A safe bet.”

  • ★★★★★

    Linda T. — Fanny

    “It’s the first time I’ve bought this kind of underwear. I’m wearing it today for the first time, and honestly it’s spot on. You feel light, you don’t feel any protection the way you do with regular pads, and I think it looks great. I’m really happy — I’ve ordered two more.”

  • ★★★★★

    Virginie H. — Margot

    “Perfect. Very good absorbency, holds well, really pleasant to wear, and not bulky.”

  • ★★★★★

    Laura T. — Liv

    “Good absorbency, very comfortable — probably because it’s seamless. I’m usually an M but I took an L, and I don’t regret it.”

  • ★★★★★

    Sophie G. — Mathilde

    “Comfortable. It was a first for me, and period underwear is so much more pleasant than pads.”

  • ★★★★★

    Sylvette B. — Gaby

    “I’m delighted. Gaby is pretty and incredibly comfortable. I’m protected all day (8 hours) and free to move without worrying about a leak. I recommend it.”

Translated from French.

See all reviews →

FAQ all about period panties

What is the most effective period underwear?

The most effective period underwear is the one that combines high absorbency, reliable leak protection, and skin-safe materials. Styles designed for heavy flow can absorb up to 40–50 ml of fluid (the equivalent of 4 to 5 tampons) and be worn for up to 12 hours, depending on your flow.

At Louloucup, our underwear is OEKO-TEX® Standard 100 certified, the inner layer against the skin is made from certified organic cotton, and the fabrics are tested PFAS-free by an independent laboratory to ensure effective, healthy protection.

How do I choose the right period underwear?

To choose the right period underwear, you need to consider how heavy your flow is (light, medium, or heavy), the lingerie style you prefer, and your size. Some women prefer high-waisted underwear at night, while others like a discreet or seamless style for daytime.

Ideally, you’ll have several pairs suited to different stages of your cycle so you’re protected in every situation.

Can you wear period underwear all day?

Yes. Depending on how heavy your flow is and the absorbency of the style, period underwear can usually be worn for between 8 and 12 hours. For light to medium flow, it can cover the whole day. For heavy flow, it may be better to change it earlier to ensure optimal leak protection.

Can you sleep in period underwear?

Yes. Period underwear for heavy flow is especially suitable at night. It usually has a wider absorbent area that extends from front to back, helping to prevent leaks while you sleep and keeping you protected all night long.

Can you play sports in period underwear?

Yes. Period underwear is designed to be breathable, discreet, and comfortable, so you can exercise or move freely. For sports or tight leggings, it’s often best to choose a seamless style, which is more invisible under clothing.

What period products does Louloucup offer?

Louloucup offers several types of reusable period protection tailored to different needs and stages of the cycle: period underwear, period swimwear, and menstrual cups. These alternatives can replace disposable products while providing comfort, reliable protection, and a sustainable solution.

Period underwear is ideal for everyday wear, period swimwear lets you swim on your period, and menstrual cups provide reusable internal protection. Each option can be chosen based on your flow, lifestyle, and preferences.

Are Louloucup panties lab-tested for PFAS?

Our panties are independently lab-tested with no PFAS detected — and we publish the report. Tested by SMT Lab under method CEN/TS 15968, down to 25 parts per billion. Nothing detected. The full report is on our Certification page. Certified under OEKO-TEX® STANDARD 100, and separately lab-tested for PFAS — because a certification and a lab report aren't the same thing.

How do I wash them?

Rinse in cold water until water runs clear, then machine-wash at 30°C / 86°F with similar colors. Air-dry only — no dryer. With proper care, your Louloucup panties last 2-3+ years.

What about shipping & returns?

Free US shipping on orders over $60 (flat rate below). Orders ship within 48 hours from our California warehouse. Unworn pairs can be returned within 30 days. Loulou takes care of you.