Scarlet Secure
- check_circle Top-rated & recommended by thousands of women
- check_circle Multi-layer protection for heavy periods & leaks – day and night
- check_circle Locks in liquid and odour – nothing reaches your clothes
- check_circle Looks & feels like regular, stylish underwear
Size guide
| Size | Waist | Hip | Rise |
|---|---|---|---|
| UK 6 to 8 (S) | 62–68 cm | 88–94 cm | 26 cm |
| UK 10 to 12 (M) | 68–74 cm | 94–100 cm | 27 cm |
| UK 14 to 16 (L) | 74–82 cm | 100–108 cm | 28 cm |
| UK 18 to 20 (XL) | 82–90 cm | 108–116 cm | 29 cm |
| UK 22 to 24 (2XL) | 90–100 cm | 116–126 cm | 30 cm |
| UK 26 to 28 (3XL) | 100–110 cm | 126–136 cm | 31 cm |
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Emma L
Show more Show lessHonestly, I didn't think they'd make much difference. But these knickers absorb much better than anything else I've tried. It's so nice not having to change my protection all the time or worry about stains on my clothes, and being able to move freely all day.
Emma L
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Tyra S
Show more Show lessI was sceptical at first because I'd tried several different products that still leaked, but these knickers work really well. Nothing leaked through.
Tyra S
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Jasmine R
Show more Show lessI usually worry on long days when I can't change straight away. These let me relax.
Jasmine R
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Siri V
Show more Show lessI used to worry about my period starting earlier than expected. But I don't have to worry about that any more.
Siri V
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Erika M
Show more Show lessI was nervous that it wouldn't work, but Scarlet Flow exceeded my expectations. The protection is reliable, the design is great, and I feel comfortable all day, every day.
Erika M










Feel the freedom to live your life, with security that stays in place
You stand up after a meeting and have time to think: “Can you tell?” You’re on your way to the gym, traveling, or just enjoying dinner with friends. But your body doesn’t always cooperate: heavier periods, small urine leaks when you laugh or cough, or a need for underwear that really stays put all day long.
You use pads or panty liners “just in case,” change more often than you want, check your seat, and choose dark clothes. All to feel secure.
Scarlet Secure is the underwear that gives you that security, without compromise. It’s made to fit softly, stably, and comfortably on your body while providing reliable protection against menstruation and leaks. The result: less worry, more freedom, and a daily life where you can move as you please.
Limited offer: Buy one pair of Scarlet Secure and get an extra pair completely free, plus a 365-day guarantee. Click “Add to cart” and feel the difference yourself.
How it works, secure design that gives you peace of mind all day
Scarlet Secure is developed with four layers that work together to provide reliable and discreet protection:
- Soft inner layer that feels like regular fabric and is gentle on the skin.
- Absorbent core that immediately draws in menstrual blood, discharge, or urine.
- Odor and moisture barrier that locks in fluid and minimizes odor.
- Protective outer layer that prevents leaks onto your clothes.
All of this fits into underwear designed to follow your body and provide a stable, comfortable fit without tightening, digging in, or feeling bulky. Scarlet Secure gives you built-in protection so you don’t have to plan your life around “what if.”
Why you’ll love Scarlet Secure
- Secure and flexible fit – stays comfortably in place all day, no matter your movement.
- Designed for menstruation & leaks – absorbs both menstrual blood and small urine leaks.
- Discreet under clothes – wear light or tight-fitting garments without anything showing.
- Soft and comfortable – no hard edges, no plastic feel.
- Thin but secure – feels like regular underwear with extra built-in protection.
- Reusable – saves money over time and reduces disposable products.
When Scarlet Secure gives you the most security
- When you want to feel secure at work or in everyday life without having to “check.”
- When you move a lot and need underwear that stays stable.
- When you have long days and want to avoid changing protection.
- When you wear light or tight clothes and want to avoid stains.
- When you want soft, reliable protection that feels good against your body.
Frequently asked questions, so you can feel completely secure
Does it feel bulky?
No. Scarlet Secure is thin and flexible, focusing on comfort and a stable fit.
Does it feel wet?
No. Fluid is quickly absorbed into the core layer, and the surface against your skin stays dry.
Does it smell?
No. The layers lock in fluid and minimize odor.
How do I wash it?
Rinse in cold water after use, machine wash at 30 °C, and air dry. Scarlet Secure is made to last wash after wash.
Can it replace pads and panty liners?
Yes. Scarlet Secure is designed to be reliable everyday protection for menstruation and leaks. For very heavy flow, you can combine it with extra protection if you wish.
Security guarantee: 365-day open purchase
Scarlet Secure is made for those who want to feel secure all day long, whether it’s for menstruation, discharge, or small urine leaks. It’s designed to give you more comfort, more security, and less worry in everyday life. That’s why you have a 365-day open purchase, so you can feel confident in your choice. Choose your size and give yourself discreet protection that helps you feel secure, comfortable, and free every day.
Pay securely with Klarna
Pay quickly and securely with Klarna at Scarlet.
Thousands of happy customers
Thousands of happy customers have already chosen Scarlet!
Fast, tracked delivery
Every order is sent with tracking, so you can follow your parcel in real time.
Customer support Monday to Friday
Have a question? Get in touch and we'll help you within 24 hours.