Pippa Triangle Bikini Top

★★★★★ (128)

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Bonnie Adjustable Period Swim Bottom ~~£39.90~~£29.90

Elsie Period Swim Bottom ~~£39.90~~£29.90

Leak-proof and odour-free

Up to 12h of protection

Machine washable

30° without fabric softener

Reusable

For 5 to 7 years

Ultra-discreet protection

No bulky feel

Description

The Sybille period swimsuit lets you swim with total peace of mind during your period, with no tampon or cup. Its patented 4-layer technology absorbs the equivalent of 3 tampons while staying 100% invisible — indistinguishable from a regular swimsuit.

Designed with textile engineers and gynaecologists, tested in chlorinated pools and seawater.

Shipping & returns

Delivery: Ships within 5 to 7 business days to the UK. Free shipping on orders over £60.

Returns: 30-day satisfied-or-refunded guarantee — even worn, even washed. If the size does not fit, free exchange. Contact us via the form on our website.

How to wash it?

Rinse in cold water until the water runs clear
Wash at 30°C in the machine or by hand with your usual detergent
Dry in open air (4 to 6h)

No fabric softener, no tumble dryer, no bleach — to preserve the absorbent technology.

Benefits

Ultra comfortable — nothing to insert, zero chafing
Absorbs the equivalent of 3 tampons, up to 12h
100% invisible — no extra layer, no string
Odour-free and antibacterial
Resistant to chlorine, salt and UV
Reusable for 5 years — 1,000+ tampons saved

Composition

Outer: 86% recycled nylon, 14% elastane — soft, chlorine-resistant, eco-friendly.

Built-in 4-layer technology:

Fast-absorption layer — wicks moisture away from the skin
Storage layer — microfibres that trap liquid
Waterproof membrane — nothing gets out, nothing gets in
Outer layer — UV50+ protection, chlorine/salt resistant

Durability

On average, a person uses 17,000 disposable products over their menstrual life — that much plastic waste ending up in the oceans.

A single Sybille swimsuit, used for 5 years, replaces around 1,000 tampons. Washable, reusable, no single-use plastic. It's good for you and for the planet.

Discover our one-piece swimsuits

1 piece

Nell One-Piece Period Swimsuit ~~£49.90~~£39.90

1 piece

Hattie One-Piece Period Swimsuit ~~£49.90~~£39.90

What our founder is saying

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Garantie 0 Fuites 🩸

Pour Ados et Adultes.

Loved by women across the UK

Trustpilot · Rated Excellent on Trustpilot · 2,140 reviews

Emma W. 🇬🇧 UK · 1 review 2 days ago

Finally swim with total confidence

Wore these for my whole holiday and never once worried about leaks. Completely invisible under my swimsuit and so comfortable.

Charlotte H. 🇬🇧 UK · 1 review 4 days ago

A game changer for the pool

Absorbent, discreet and no bulky feeling whatsoever. I can finally swim on my period without a single worry.

Olivia B. 🇬🇧 UK · 1 review 1 week ago

Brilliant quality

The fabric feels lovely and holds up beautifully wash after wash. Genuinely the best menstrual swimwear I've tried.

Sophie M. 🇬🇧 UK · 1 review 1 week ago

No more skipping the beach

I used to dread swimming on my period. These changed everything — secure, soft and you truly cannot tell.

Grace T. 🇬🇧 UK · 1 review 2 weeks ago

Comfortable and reliable

Stayed perfectly in place while swimming and snorkelling. Zero leaks and they dried quickly too. Highly recommend.

Hannah L. 🇬🇧 UK · 1 review 3 weeks ago

Honestly so discreet

You honestly cannot tell these are period swimwear. Flattering fit and brilliant protection — worth every penny.

Amelia R. 🇬🇧 UK · 1 review 3 weeks ago

Perfect for my teenager

Bought a pair for my daughter and she finally feels confident swimming at school. Thank you Henriette!

Jessica P. 🇬🇧 UK · 1 review Last month

Wish I'd found these sooner

Light, secure and absolutely invisible under my bikini. I've already ordered a second pair.

They're talking about period swimwear

What a Sybille swimsuit does best.

Developed with textile engineers and gynecologists: as thin as a classic swimsuit and with the best absorption on the market.

Find your perfect swimsuit

Which period swimsuit is right for you?

Answer 2 questions and discover the style that suits your body and your flow.

Question 1 / 2

What protection do you usually use on a typical period day?

Question 2 / 2

On your heaviest days, how often do you change your protection?

Your result

View the swimwear collection

Swimming during your period.
Without mental arithmetic.

12 PM water protection
3x buffer absorption
0 leak — 30-day warranty
4 years Research & Development

Trustpilot

Loved by women across the UK

Real, verified experiences from our customers.

Excellent

Trustpilot

Based on verified reviews

Emma W.

GB· 1 avis

3 days ago

Period swimsuit for my daughter

I ordered one for my daughter last year. After a sizing mistake on my part, customer service were lovely and sent a replacement in the right size (do size up from her usual). She's delighted with it — so practical she's worn it all summer.

Charlotte H.

GB· 1 avis

5 days ago

Holiday saved

Bought our second pair two years in a row as we were already thrilled with the first. My 17-year-old wears them in the sea and pool on her period (which is heavy) and has never had a single problem. Comfortable, reassuring and looks just like a normal costume. Highly recommend!

Sophie M.

GB· 1 avis

1 week ago

Brilliant for my teenager

Ordered for my teenage daughter and it's changed her life. No more restrictions — freedom to swim at last! Customer service were also really quick to answer our questions. She's even told all her friends.

Olivia B.

GB· 1 avis

2 weeks ago

Very satisfied

Really pleased — it's pretty and you can't tell it's a period swimsuit. My periods are quite heavy and it was perfect for a full beach day. Lovely experience with customer service for an exchange too. One tip: they run small, so size up one or two.

Grace T.

GB· 1 avis

3 weeks ago

Effective swimsuit

Ordered last year, lovely to wear, genuinely protects during your period and is discreet — you really can't tell it's period swimwear. For sizing, I'd go one size up from usual to be comfier.

Amelia R.

GB· 1 avis

Last month

Great bottoms, no complaints

Nothing to fault! I was sceptical at first but there wasn't a single leak. I needed to exchange for a bigger size as they run small, and the aftersales service was really quick and helpful. Recommend without hesitation!

Everything you need to know before buying

Your questions, our answers

Product & Performance

Does it REALLY work in a swimming pool?

Yes. That's the fundamental difference from regular period underwear: the waterproof layer is designed to withstand prolonged immersion in chlorinated pools and sea water. Tested by our customers over full days with no leaks reported.

What flow level does it work for?

Perfect for moderate to heavy flow (equivalent to 2–3 tampons). For a very heavy flow, our honest recommendation: combine with a cup or change between swims.

Is it really invisible under the swimsuit?

Yes, completely. The 4-layer technology is as thin as a regular swimsuit. No creases, no visible thickness, even under a fitted light-coloured swimsuit.

What is the swimsuit made of?

Bottoms are made of 86% recycled Nylon and 14% Elastane — soft, chlorine-resistant and eco-friendly. Tops are 82% Polyamide and 18% Elastane for optimal support. The intimate lining features our patented Sybille® 4-layer technology.

What's the difference from regular period underwear?

Regular period underwear absorbs but isn't designed for immersion. Our swimsuits have a specific waterproof membrane that prevents water from getting in and flow from getting out — even in chlorinated pools or the sea.

Chlorinated pool AND sea water — does it work in both?

Yes, both. The technology has been tested in chlorinated and sea water. Chlorine doesn't affect the waterproof membrane or absorption capacity. Neither does salt.

Does it protect against UV rays?

Yes. The outer layer provides UV 50+ protection, shielding skin from harmful rays even when wet.

Care & Durability

How do I care for my swimsuit?

Rinse in cold water straight after use, then machine wash at 30°C with your usual detergent. No fabric softener, no tumble dryer. Air dry — that's it.

How long does it take to dry?

Air-dried, around 4–6 hours depending on the heat. If you're going on holiday, pack two — while one dries, you wear the other.

Does absorption decrease with washing?

No, as long as you follow the care instructions (30°C, no fabric softener, no tumble dryer).

How long does a Sybille swimsuit last?

With proper care, expect 2–5 years depending on frequency of use.

Can I use Marseille soap or vinegar?

Marseille soap is perfect for hand rinsing. Diluted white vinegar can be used occasionally to neutralise residual odours. Avoid bleach and chemical stain removers.

Use

How long can I wear it?

Up to 12 hours depending on flow. You can swim, sunbathe, have lunch, swim again — a full day at the beach or pool without needing to change.

Is there an odour after swimming?

No. The intimate layer has antibacterial treatment to prevent any odour from developing.

From what age can it be worn?

From the very first period. It's often the ideal solution for teenagers: nothing to insert, no stress about leaking during swimming. Sizes from XS (ages 10–14).

Can I wear it as a normal swimsuit outside my period?

Absolutely. It's a real swimsuit first and foremost — stylish, comfortable, thin.

Can I combine it with a cup or tampon?

Yes, and we actually recommend it for heavy flow. The swimsuit acts as a safety net: if the cup overflows or the tampon saturates, the swimsuit takes over.

Can I do water sports in it?

Swimming, aqua aerobics, paddleboarding, snorkelling — no problem. The swimsuit is designed to move with you.

What about light bladder leaks?

The absorbent technology also works for light bladder leaks. Many post-partum or perimenopausal customers use it at the pool for exactly this reason.

Orders & Customer Service

How do I choose my size?

Our swimsuits run slightly small — go one size up from your usual size. A detailed size guide is available on each product page.

Is it really worth the price?

£29.90. Over 5 years, that's about 3p per use — versus 25p for a disposable tampon. Beyond the savings, it's 1,000+ disposables avoided.

What are the delivery times?

Delivery in 5–7 working days to mainland UK. Free shipping on orders over £50. You'll receive a tracking number by email as soon as it ships.

What if it doesn't fit or leaks?

30 days to test it. Wrong size: free exchange. Product doesn't deliver: full refund, even worn, even washed. Zero risk to try.

Is payment secure?

Yes, 100%. We use Shopify Payments' secure payment platform (SSL encryption). Credit card, Apple Pay or Shop Pay.

Can I give a Sybille swimsuit as a gift?

Of course. The exchange is free within 30 days if the recipient needs to swap sizes.

4.9 Based on 128 reviews

5 116

4 8

3 2

2 1

1 1

Isla M. Verified purchase

2 October

Finally swim on my period with zero worries

I was so nervous about wearing a swimsuit during my period on holiday, but these bottoms were a total game-changer. No leaks at all and the fit is lovely. Wish I'd found them sooner!

Freya B. Verified purchase

24 September