Draining
The layer in contact with your skin immediately wicks fluid toward the absorbent core. You stay dry all night.
New · Sweet nights, safe days
Finally, nights without having to think about it.
The menstrual boxer designed for nighttime, even on heavy-flow nights.
Extended absorbent zone at the front and back. Turn over, sleep on your back, or simply sleep.
Discover the night boxer briefs
60 days to try it, satisfied or your money back
- Heavy to very heavy flow
- Extended front and back area
- Seamless, second-skin feel
- Certified French B Corp brand
The observation
At night, your flow doesn’t increase. It shifts.
When you’re lying down, your flow no longer follows the same path. It runs toward the back, where a pad ends and where most period products don’t extend high enough.
That’s why you can be perfectly protected all day and still wake up with a stain in the morning.
- You sleep in one position, afraid to move.
- You wake up to check, sometimes several times
- You add a pad “just in case,” and feel it all night long.
Your flow while lying down
When lying down, the flow rises above the absorbent area. That’s where the leak occurs, almost always at the back.
The absorbent area extends well beyond this point. You can turn over and sleep on your back—the protection follows you.
The problem was never your flow. It’s the shape of the protection.
The answer
An absorbent area that rises where it matters.
The Smoon Night Boxer extends the absorbent area across the front AND back, right up to the edges of the garment. Not just a gusset: a surface designed for lying down.
The result: you can turn over, sleep on your back or on your stomach. The protection stays where you need it.
+53 %
average absorption capacity compared with the heavy-flow period underwear on the market. Measured in a laboratory.
- Extended front and back areaAll the way to the garment’s edges. A surface designed for lying down, not just the bottom of a pair of panties.
- Heavy to very heavy flowA full night of protection, without having to get up to check.
- Seamless, second-skin feelNo bulky feeling. The boxer briefs feel like pajama bottoms and reduce chafing.
- OEKO-TEX® STANDARD 100 CertifiedCertificate No. CQ 1285/1. PFAS-free, verified across all our materials.
Technology
Three layers. One dry night.
What wakes you up at night isn’t leakage. It’s the feeling of dampness. Our three fabrics are designed for that.
Absorbent
The technical core retains the flow and locks it in, even when lying down and even under the pressure of the body.
Waterproof & breathable
The outer layer prevents leaks onto the sheets while allowing the skin to breathe. No greenhouse effect.
Zero moistureZero odorZero leaks
Designed for your nights
Every night is different.
Nights with heavy flow
For those nights when you double up on protection and still wake up. The boxer is designed primarily for nights like these.
Nights away from home
Hotel, weekend at friends’ place, business trip. Sleep in sheets that aren’t yours without giving it a second thought.
Nights that change
Postpartum, endometriosis, perimenopause: when your flow is no longer what you’re used to, your protection should adapt.
Nights that are already too short
When you sleep little, every wake-up counts. You can do without this one.
Let’s talk about it
Are you still doubling up on protection? That’s normal.
Many women add a pad at night, just to be safe. After years of leaks, confidence doesn’t return overnight.
So go ahead. Keep your pad the first night if it reassures you. You’ll see for yourself that it was dry in the morning.
Usually, it’s on the second or third night that you stop doubling up. Without even thinking about it.
What changes, concretely.
Your nights today
Your nights with the boxer shorts
One position, without moving
Sleep however you like
One alarm to check, sometimes two
You sleep through the night.
An extra pad, “just in case”
One protection is enough
The feeling of dampness upon waking
Dry until morning
The sheet to check first thing in the morning
You just get up, that’s all.
The proof
Tested, measured, certified.
Laboratory-tested absorbency
On average, 53% more capacity than other high-flow period underwear on the market. Equivalent to 4 regular tampons.
OEKO-TEX® STANDARD 100
Certificate No. CQ 1285/1. Each component is tested for harmful substances.
PFAS-free
Tested on all our materials, from the outer fabric to the membrane.
Certified French B Corp brand
First menstrual underwear brand to become B Corp certified and receive an EcoVadis Platinum rating.
Our performance is measured, not estimated.
They’re already sleeping peacefully.
4,5/5 Over 3,000 reviews · 70,000 women supported
You can really sleep peacefully. No leaks, super-thick protection, and yet it’s not uncomfortable.
Very comfortable for sleeping peacefully all night.
I love not having to worry about possible leaks at night.
Start the trial
How many boxer briefs do you need to cover your nights?
A pair of boxer briefs should be rinsed, washed, and air-dried. To cover your nights of heavy flow without doing emergency laundry, plan on two to three pairs.
The night boxer briefs
Boxer menstruel Léto
The most full-coverage nighttime protection in the range. An expanded absorbent zone at the front and back, seamless.
35,00 €
60 days satisfied or your money back
Tracked delivery · easy exchanges
Certified French B Corp brand
Your questions
Your questions, our answers.
How far up does the absorbent area extend?
It rises at the front and back, up to the edges of the boxer briefs. That’s exactly what changes when lying down: the flow moves toward the back, and the area is there to catch it. A classic pair of underwear, on the other hand, stops at the bottom.
How long can I wear it?
A full night. Depending on your flow, the boxer provides up to 12 hours of protection. With a very heavy flow, allow for an 8-hour night instead, as with any period product.
Can I wear it alone, without a pad?
Yes. And if you prefer to double up the first night, do so: it’s the best way to check for yourself that the pad was dry in the morning.
Does it cause an odor?
No. The moisture-wicking layer channels the flow toward the absorbent core, and the waterproof layer prevents leakage. Overnight, there is no noticeable odor.
Does it look bulky under pajamas?
No. The absorbent area is spread over a larger surface, making it thinner, not thicker. The seamless technology doesn’t show under clothing.
How do I care for it?
Rinse with cold water until the water runs clear, then machine wash at 30°C in a mesh laundry bag. Air-dry, never tumble-dry.
How long does it take to dry?
Air-dry them without using a tumble dryer: allow several hours, or longer in a poorly ventilated room. That’s why we recommend having two or three—the time one takes to dry, another is ready.
Which size should I choose?
The boxer fits like our period panties: if you already wear them, choose the same size. Otherwise, measure your waist and hip circumference and refer to the size guide.
What if it doesn’t suit me?
You have 60 days to try it. If your nights don’t improve, we’ll refund you.
Tonight, you can just sleep.
The period boxer designed for nighttime, even with heavy flow. Try it for 60 days. If your nights don’t improve, we’ll refund you.
I’m trying the night boxer briefs.
60 days satisfied or your money backTracked deliveryEasy exchangeFrench B Corp brand
Boxer menstruel Léto
35,00 € · 60 days to try it
Size guide
Waist measurement: at the narrowest part of your torso, above the navel. Hip measurement: at the widest part, keeping the measuring tape level. If you are between sizes, choose the larger size.
| Size | Bottom size | Waist circumference | Hip circumference |
|---|---|---|---|
| XS | 34 | 56-62 cm | 84-88 cm |
| S | 36 | 62-68 cm | 88-92 cm |
| M | 38 | 68-74 cm | 92-96 cm |
| L | 40 | 74-80 cm | 96-100 cm |
| XL | 42 | 80-86 cm | 100-104 cm |
| XXL | 44 | 86-92 cm | 104-108 cm |
The boxer fits like our period underwear. If you already wear them, choose the same size.