Scarlet Flow Teen

4.7 (12753 reviews)
Regular price £24.99
Sale price £24.99
  • Chosen by thousands of mothers to give their daughters a safe start
  • Multi-layer protection against periods and leaks – secure all day and night
  • Absorbs fluid and locks in odor – so nothing reaches clothes
  • Looks and feels like regular comfortable underwear – discreet and secure
📏 Size guide
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📏

Size guide

Choose the size she usually wears in clothing. The measurements below are garment measurements in centimeters (cm). This model runs large, so if she is between two sizes, we recommend choosing the smaller size for a soft and comfortable fit.
Size Age / clothing size Waist of the underwear Hip of the underwear Rise
S9 to 10 Years (134/140)60 cm68 cm26 cm
M11 to 12 Years (146/152)64 cm72 cm27 cm
L13 to 14 Years (158/164)68 cm76 cm28 cm
XL14 to 15 Years (165/170)72 cm80 cm29 cm
XXL15 to 16 Years (170/176+)76 cm84 cm30 cm
💡 Unsure between two sizes? Choose the smaller size for a soft and comfortable fit.
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  • Emma L

    I wish these had been around when I was younger. My daughter wears them to school and at night, and says they're much more comfortable than other period products she's tried. They've really made those first few months of periods easier for us.

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    Emma L

  • Tyra S

    My daughter recently started her periods, and I wanted to find something that felt simple for her. These knickers have really helped. She says they feel like normal underwear and she doesn't have to think about her period all the time. As a mum, it's reassuring to know she feels protected all day.

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    Tyra S

  • Jasmine R

    The best thing is probably how much more relaxed my daughter is now. She used to worry a lot about period stains showing through her clothes, but she feels much more confident in these knickers. They really do look like normal underwear.

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    Jasmine R

  • Siri V

    I bought these for my daughter before her first period, and they were a real relief for both of us. She was quite nervous before, but now she feels much more confident at school. The knickers fit well, and she doesn't have to worry about leaks or stains.

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    Siri V

  • Erika M

    We've tried several different period products, but nothing has been as practical as these. My daughter wears them to school and when she's exercising without worrying about leaks. She says she feels much more confident now.

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    Erika M

View full details

Give her the confidence to be a teenager – without worrying about leaks

No mum wants her daughter sitting in the classroom thinking: "Can they see it?" or skipping PE, swimming, sleepovers, and ordinary school days because she feels unsure about managing her period. For many young girls, it’s not just the period itself that’s difficult – it’s the fear of leaking, staining clothes, or feeling uncomfortable all day.

Scarlet Flow is the underwear that gives her confidence from the very first moment. It looks and feels like ordinary, pretty knickers – but inside there are four smart layers that absorb menstrual blood and lock in fluid so the surface against the skin feels dry. The result? Less worry, fewer uncomfortable situations, and a day where she can focus on school, friends, and just being a teenager.

Limited time offer: Buy one pair of Scarlet Flow and get an extra pair completely free – plus a 365-day guarantee. Click "Add to cart" and give her safer period protection today.

How it works – reliable protection without the bulk of a pad

Scarlet Flow is built with four layers that work together to provide discreet yet effective protection:

  • Soft inner fabric that feels comfortable and dry against the skin.
  • Absorbent layer that quickly soaks up menstrual blood and helps keep her protected longer.
  • Moisture and odour barrier that locks in fluid and minimises odour.
  • Protective outer layer that helps prevent leaks onto clothes.

All this is built into knickers that feels much more natural than thick pads. Scarlet Flow is made for girls who want to feel secure – without visible bulk, chafing or disruption to their day.

Scarlet Flow – layers that protect against leaks

Why mothers choose Scarlet Flow for their daughters

  • Less worry at school – helps her feel confident during classes, breaks, and long school days.
  • Perfect when she doesn’t want to use a tampon – a safe alternative for girls who don’t feel ready.
  • No "nappy feeling" – soft, thin, and comfortable without any plasticky feel or chafing.
  • Discreet under clothes – fits nicely under leggings, jeans, and sportswear.
  • Reassuring protection at night – helps reduce worries about bedding, pyjamas, and night-time leaks.
  • Reusable – can be washed and worn again and again, saving money over time.
  • Comfortable fit – moves with her body and stays in place, even when she moves a lot.

When Scarlet Flow makes the biggest difference

  • When she’s at school and doesn’t want to worry about stains showing when she stands up.
  • When she has PE, dance, sports practice, or an active day and wants to move freely.
  • When she’s sleeping and wants to feel more secure throughout the night.
  • When she’s going on sleepovers, travelling, or will be away from home for a long time.
  • When her periods have just started, are irregular or are hard to predict.
  • When she wants to avoid thick pads that feel uncomfortable and show under clothes.

Your questions, answered

Is Scarlet Flow suitable for young girls?
Yes. Scarlet Flow is a safe and comfortable option for girls who want protection without using tampons or feeling uncomfortable in pads.

How long can she wear it?
Scarlet Flow is designed to provide confidence throughout a whole day or night. Many wear it all day at school without needing to change.

Does it feel thick or bulky?
No. Scarlet Flow is thin, soft, and discreet – it feels more like regular underwear than a traditional period product.

Does it feel wet?
No. The layers help absorb and lock in fluid, so the surface against the skin feels drier and fresher.

Does it smell?
No. The smart layers help trap fluid and minimise odour throughout the day.

How do you wash it?
Simple: machine wash at 40-60°C and air dry. Scarlet Flow is made to withstand repeated washing.

Can it replace pads?
Yes, many use Scarlet Flow as their usual period protection and avoid pads altogether. For many girls, it becomes a safer, more comfortable, and more discreet everyday option.

Materials and care

Materials:
85% nylon, 15% elastane (outer fabric)
95% viscose, 5% elastane (gusset)

Care instructions:

  • Machine wash at 40-60°C.
  • Do not tumble dry. Do not iron. Do not dry clean.
  • Air dry by hanging or laying flat.

Shop with confidence: 365-day returns

We know that as a mum, you want to feel confident that you’re making the right choice. That’s why you have 365 days to return it. Scarlet Flow Teen is designed to give your daughter more confidence, more comfort, and less worry in everyday life. Choose the right size and give her period protection that helps her feel safe, comfortable, and free at school, at home, and everywhere in between.

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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.

Reviews

4.7/ 5 70,000+ happy customers
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