★★★★★
"High-quality and super comfortable. Highly recommend. Arrived very quickly."
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Flunae
Leakproof Period Underwear
Leakproof Period Underwear
Regular price
$14.99 USD
Regular price
$0.00 USD
Sale price
$14.99 USD
Taxes included.
Shipping calculated at checkout.
Why you'll love them
- Triple-Layer Leakproof Design — Engineered with a 3-layer construction (outer fabric, waterproof barrier, and absorbent cotton crotch) designed to handle heavy flow days comfortably.
- Premium Combed Cotton Crotch — Soft, breathable cotton lining that helps wick moisture, reduce odor, and keep you feeling fresh and dry.
- Made Without PFAS or Harsh Chemicals — Crafted from skin-friendly fabrics produced to recognized textile safety standards. Gentle on your body and kinder to the planet.
- Easy to Wash & Designed to Last — Reusable, machine-washable, and built to keep their shape, color, and fit wash after wash. A sustainable, money-saving alternative to disposables.
- Comfortable High-Rise Fit — Soft elastic waistband that won't roll or bunch, reinforced stitching to help prevent ride-up, and full-coverage design for all-day comfort.
Quantity
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Meet your new period essential. These period panties are designed to give you total confidence and comfort during your cycle — no pads, no tampons, no leaks, no stress.
Crafted from premium combed cotton and built with leakproof construction, these panties are made to absorb heavy flow while helping you feel dry, fresh, and protected.
The flattering high-waist cut offers full coverage without digging in or rolling down, so you can move freely whether you're working out, sleeping, or going about your day.
Whether you wear them as your main period protection or as a backup with tampons or cups, they are a smart, sustainable choice for women who want comfort and peace of mind month after month.
Great for:
- Heavy flow days and overnight wear
- Workouts, travel, and long workdays
- Postpartum recovery and light bladder leaks
- Teens experiencing their first periods
- Anyone looking for an eco-friendly alternative to disposable products
Heavy Flow Absorbency — Designed to handle heavy flow days, these panties are built to provide significant absorbency without feeling bulky, wet, or uncomfortable.
Triple-Layer Leakproof Construction:
- Outer Fabric — Soft, breathable, and stretchy for a flattering fit
- Waterproof Barrier — Helps lock moisture in and prevent leaks from reaching your clothes
- Absorbent Cotton Crotch — Wicks moisture away from your skin to help you feel dry
Built to Last — Reinforced stitching, quality lining, and careful workmanship are designed to resist tearing, fading, and stretching even after repeated washes.
Easy Care Instructions:
- Rinse in cold water after use until water runs clear
- Machine wash cold on a gentle cycle
- Hang to dry (avoid bleach, fabric softener, and tumble drying)
With proper care, each pair is designed for long-lasting use.
Odor Control & Freshness — The crotch fabric is treated with antibacterial and odor-control technologies to help you feel fresh throughout the day.
Premium, Skin-Friendly Fabrics:
- Outer Layer: Soft combed cotton blend — breathable, stretchy, and gentle on sensitive skin
- Middle Layer: Waterproof TPU membrane — leakproof yet flexible and quiet
- Crotch Lining: 100% organic cotton — hypoallergenic, moisture-wicking, and ultra-soft
Made Without:
- PFAS ("forever chemicals")
- Phthalates
- Formaldehyde
- Harsh dyes or bleaches
Manufactured to Recognized Standards
The materials and facilities are certified to internationally recognized standards, including OEKO-TEX® Standard 100, GOTS, GRS, and amfori BSCI.
The crotch fabric is also treated with antibacterial and odor-control technologies developed to help you feel fresher for longer.
Sustainability First — By choosing reusable period panties, you're helping reduce the thousands of disposable pads and tampons that end up in landfills every year.
One reusable pair replaces hundreds of disposable products.
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Find your fit
Between sizes? We recommend sizing up for maximum comfort.
Use the chart below to find the perfect size for you. All measurements are listed in inches with centimeters as a reference.
| Size | US Size | Waist in | Hips in | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|
| S | 4–6 | 26–28″ | 36–38″ | 66–71 | 92–98 |
| M | 8–10 | 28.5–30.5″ | 39–41″ | 72–77 | 99–104 |
| L | 12–14 | 31–33″ | 41.5–44″ | 78–84 | 105–111 |
| XL | 16–18 | 33.5–36″ | 44.5–47″ | 85–92 | 112–119 |
| 2XL | 20–22 | 36.5–40″ | 47.5–50.5″ | 93–101 | 120–128 |
Heads up: our panties are made from soft, stretchy fabric, so actual measurements may vary slightly from the chart.
Free Shipping
Free shipping on all orders, anywhere in the US.
Free Returns
Within 30 days of your purchase — no questions asked.
Happy Customers
Shop with total confidence, security, and support.
★★★★★
"Great quality fabric. They hold everything very well."
— Verified buyer★★★★★
"Love them. Very good material and super comfortable."
— Verified buyer★★★★★
"The quality is amazing. Tip: size up — they run a bit small."
— Verified buyer★★★★★
"Nice fit, matches the description. I'm usually S/M and size L fit perfectly."
— Verified buyer★★★★★
"Superb — especially for this price."
— Verified buyer★★★★★
"Exactly what I was looking for."
— Verified buyer★★★★★
"Spectacular! Absolutely loved them — they became my new favorites."
— Verified buyer★★★★★
"Third time ordering — best quality I've tried. 100% recommended."
— Verified buyer★★★★★
"Excellent quality. Got them for my daughter — ordering more colors."
— Verified buyer★★★★★
"Good quality, comfortable, and a great price point."
— Verified buyer★★★★★
"Great! Quick note: size M runs closer to an S."
— Verified buyer★★★★★
"Punctual delivery, perfect material, super protection. 10/10."
— Verified buyer★★★★★
"Super comfortable, great quality and price."
— Verified buyer★★★★★
"Dense, pleasantly soft fabric. Feels premium."
— Verified buyer★★★★★
"Comfortable. Would recommend."
— Verified buyer★★★★★
"They're really good."
— Verified buyer★★★★★
"Simply super."
— Verified buyer
Triple-Layer Technology
Engineered to protect
Smart layers,
total protection.
Every pair is built with a 3-layer system that absorbs heavy flow, stops leaks, and keeps you feeling dry — wear after wear.
1
Soft cotton top layer
Wicks moisture away to keep you dry and comfortable.
2
Absorbent core
Holds up to heavy flow without feeling bulky.
3
Leakproof outer barrier
Quiet, breathable, and built to keep leaks where they belong.
Skin-friendly fabrics
No harsh chemicals
Machine washable
Got questions?
We've got the answers.
Everything you need to know about caring for, wearing, and loving your Flunae period panties.
Caring for your period panties is simple. After use, rinse them in cold water until the water runs clear. Then machine wash cold on a gentle cycle with your regular laundry (avoid fabric softener and bleach as they can affect absorbency).
Hang to air dry — do not tumble dry or iron. With proper care, your panties are designed to last for years of regular use.
Our period panties are designed for heavy flow days and can hold the equivalent of multiple tampons' worth of fluid. They work great on their own for most users, or as reliable backup protection alongside tampons or menstrual cups.
The triple-layer construction helps keep you feeling dry and protected throughout the day and night.
Not at all! Despite their high absorbency, these period panties are designed with a sleek, low-profile fit. The waterproof layer is thin and flexible, so they look and feel like regular underwear under your clothes.
The smooth outer fabric won't create visible lines under leggings, jeans, or dresses.
Yes. Our panties are made without PFAS, phthalates, formaldehyde, or harsh chemicals. They're produced by a manufacturer whose facilities and materials are certified to internationally recognized textile safety standards, including OEKO-TEX® Standard 100 testing for harmful substances.
The organic cotton crotch lining is gentle and hypoallergenic, making them suitable for sensitive skin.
Most customers find that 4–6 pairs work well for a full cycle, allowing you to wear one while others are being washed and dried. If you have a heavier flow or prefer to change more frequently, you might want 6–8 pairs.
Many users also keep a few on hand for unexpected periods, travel, or as backup protection during postpartum recovery.