Draining
The material in contact with the skin instantly wicks the flow into the absorbent layer. Your skin stays dry all night.
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
- For heavy flow
- Extended front and back area
- Second-skin effect
- 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.
The problem was never your flow. It’s the shape of the protection.
The answer
An absorbent area that rises where it matters.
For most period products, the absorbent area is limited to a narrow strip between the legs. On the Smoon Night Boxer, it extends higher at the front and back. That’s exactly where your flow moves when you’re lying down.
The result: you can turn over, sleep on your back or your stomach. The protection stays where you need it.
+53 %
average absorbency compared with heavy-flow menstrual underwear on the market, equivalent to 4 regular tampons. Lab-tested.
- Higher-absorbency area at the front and back.Designed for lying down, when classic underwear stops too soon.
- Heavy flowA full night of protection, without having to get up to check.
- Second-skin effectNo 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 materials. One dry night.
What ruins a night isn’t just leakage. It’s also the feeling of dampness. Our three fabrics are designed to address both.
Absorbent
The absorbent material retains menstrual flow, even when lying down and under the weight of the body. Capacity 53% higher than the market average, equivalent to 4 regular tampons.
Waterproof & breathable
The outer material forms a complete leakproof barrier: no liquid passes through to the sheets. It allows the skin to breathe without feeling hot.
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.
Keep it if it reassures you. It simply slips into the boxer briefs without getting in the way.
But let’s be honest: as long as you’re doubling up, it’s the pad doing the work. The real test is the night you don’t wear one. You might as well choose it well.
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”
No protection needed
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 and 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.
They’re already sleeping peacefully.
4,4/5 more than 3,376 reviews · over 138,000 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
Léto menstrual boxer briefs
The most full-coverage seamless night protection in the range.
Flow abondant
35,00 €
Day and nightSave 7,00 €
Starter Pack — Night & Day
- 1 Boxer Léto
- 1 SELÉNÉ panty
63,00 €
70,00 €
Very heavy flowSave 8,00 €
Discovery Duo — Sweet Nights
- 1 Boxer Léto
- 1 HÉCATE panty
72,00 €
80,00 €
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 is higher at the front and back than a classic pair of underwear, whose absorbent area is limited to the section between the legs. That makes all the difference when lying down: the flow moves toward the lower back, and the area is there to absorb it.
How long can I wear it?
A full night. Like all our styles, the boxer provides 8 to 12 hours of protection depending on your flow.
Can I wear it alone, without a pad?
Yes, that’s how it’s designed. If you prefer to wear an extra layer for the first few nights, go ahead: the pad slips into the boxer shorts without causing any discomfort. Just be aware that while you’re wearing both, the pad is what absorbs the flow. To form your own opinion, try the boxer shorts alone for one night at home, on a day when you know your flow.
Does it cause an odor?
No. The moisture-wicking fabric draws the flow toward the absorbent core, while the waterproof fabric prevents leakage. Over the course of a night, there is no noticeable odor.
Does it look bulky under pajamas?
No. The absorbent area is spread over a larger surface rather than concentrated in one place. The result: it stays thin, and the finish 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. Air-dry; never tumble-dry. Avoid fabric softener and oily soaps, which clog the fibers and reduce absorbency.
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. While one is drying, the other is ready to use.
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
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.