Sisters Republic UK

Size guide

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To choose the right size, measure your pelvis (at the level of the hip bones, see diagram opposite) and refer to the chart below:

Your pelvis
size (cm)
Size
internationnal
Size EU Size IT Size UK
76-78 10/11 yrs 10/11 yrs 10/11 anni 10/11 yrs
79-81 2XS・12 yrs 32 38 6
82-86 XS・14 yrs 34 40 8
87-91 S・16 yrs 36 42 10
92-96 M・18 yrs 38 44 12
97-101 L 40 46 14
102-106 XL 42 48 16
107-111 2XL 44 50 18
112-116 3XL 46 52 20
117-121 4XL 48 54 22

Top

Which absorption to choose?

Our period pants are available in 3 levels of anti-leak absorption, so you always have the right underwear for your flow.

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LIGHT

Equivalent :

  • 1 to 1,5 pads (10ml)
  • 1 towel
  • 0.5 cup

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MEDIUM

Equivalent :

  • 2 pads (15ml)
  • 2 towels
  • 1 cup

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SUPER

Equivalent :

  • 3 pads (20ml)
  • 3 towels
  • 2 cup

ESSAYER AVANT D'ACHETER

30 JOURS POUR ESSAYER AVANT D’ACHETER

1 - Choisis tes articles

Ajoute au panier tes articles dans la limite de 500€. Tu peux les essayer chez toi sans avancer d’argent.

2 - Sélectionne essayer avant d’acheter

Sélectionne Elyn au moment de finaliser ta commande à l’étape du paiement. Entre tes coordonnées comme pour un paiement classique, mais aucune inquiétude tu ne sera pas débité(e)*.

3 - Essaies tes articles à la maison

Profite de 30 jours après la réception de ta commande pour te décider et pour nous faire part de ton choix. Tu ne seras ensuite uniquement débité(e) des articles que tu souhaites garder. Tu as même la possibilité d’essayer une culotte gratuitement en conditions réelles pendant 30 jours. Ce n’est valable uniquement que pour ton tout premier achat et cette offre n’est valable que sur une seule culotte déjà portée. La ou les autres culottes doivent être essayées par dessus tes sous-vêtements.

*hors frais de livraison si applicable.

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FREE DELIVERY FOR ORDERS ABOVE £34 (in the UK) 😍 No customs duties 😍

STUDENTS ? -15% DISCOUNT ALL YEAR ROUND Read more

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ALREADY 200,000 SISTERS WON OVER BY THE EFFECTIVENESS OF OUR MENSTRUAL PANTS

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WORRY FREE PERIOD UNDERWEAR

Sisters Republic UK

NO LEAK

Thanks to our 3 levels of absorption, you can choose the right period underwear for your current flow and enjoy life worry-free!

Sisters Republic UK

BREATHABLE

The ultra-absorbent fabric draws moisture away from the surface to keep you dry and comfortable.

Sisters Republic UK

ODOUR-FREE

Unlike sanitary pads, which can be made from up to 80% plastic, our underwear means you can go right through your day with no risk of odours.

Sisters Republic UK

zero TOXIC SUBSTANCES

All the fabrics used in our underwear are either certified organic cotton or OEKO-TEX standard 100 and are therefore guaranteed to be free of harmful substances to you and the environment.

Sisters Republic UK

ZERO WASTE

Our period underwear can be washed and reused for many years, which means less waste for the planet.

Sisters Republic UK

ZERO WASTAGE

The amount we spend on sanitary products every month adds up. Stop throwing money away on items you throw out. Our period underwear lasts between 5 and 7 years, helping you to save money. A single menstrual panty can save you 2,275 tampons over 7 years.

Compose your pack

Compose your pack

Choose a ready-made pack or compose your own, and in both cases, save up to 20%!

Create my personalized pack
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Test our menstrual panties in real-life conditions
for 1 full cycle, and if you're not convinced, WE'LL GIVE YOU your money back, no questions asked!





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How does it work?

In fact, it's just like wearing regular panties. You don't have to use anything else because it's the menstrual panties themselves that act as protection thanks to an absorbent part hidden inside.
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1. BREATHABLE ORGANIC COTTON LINING

2. ULTRA-ABSORBENT, ANTIBACTERIAL FABRIC

3. LEAK-PROOF WATERPROOF FABRIC

Sisters Republic UK

The effectiveness of our panties has been tested under independent gynecological supervision.
View study results

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All our models are available in
3 degrees of absorption

Sisters Republic UK

LIGHT

Equivalent

1 to 1.5 pads

(10ml)

Sisters Republic UK

MEDIUM

Equivalent

2 pads

(15ml)

Sisters Republic UK

SUPER

Equivalent

3 pads

(20ml)

Sisters Republic UK

Why is organic cotton lining so safe for me and the environment?

All our menstrual briefs are lined on the inside with certified organic cotton, so that the fabric's contact with your private parts is soft and 100% safe for your health.

Our ORGANIC cotton is also highly breathable, rapidly draining the flow inside the menstrual panty to ensure a dry feel on the surface and avoid the odors that can occur with sanitary pads, which are often made of over 80% plastic (a non-breathable material that encourages maceration and the proliferation of bacteria, and therefore odors).

Organic cotton also enables us to limit the environmental impact of our menstrual panties, since cotton cultivation is responsible for almost 25% of pesticide use worldwide.

The rest of our fabrics, laces and elastics are Oeko-Tex certified, i.e. guaranteed free of substances harmful to the body and the environment.

Sisters Republic UK

Our washing tips

Taking care of our menstrual panties is ultra-simple:

1 - After use, rinse under cold running water until the water runs clear.

2 - Machine wash at 30 °C with the rest of the laundry (or hand wash in lukewarm water).

3 - let it air dry

For more details, go to the "Washing and care" page at the bottom of the 👇🏻 website.

why choose sisters ?

Sisters Republic UK

Free delivery from £34

The Sisters will deliver to your home for free within 48 to 72 hours for orders over £34! Offer only valid in U.K. For all delivery details and conditions, please consult the “Payment and delivery” section.
Sisters Republic UK

30 days to change your mind

Did you order the wrong size? Or perhaps the wrong style? Did you just change your mind? Don't panic! With Sisters Republic, you have the option to return your item(s) within 30 days. To be sure your return is accepted, please make sure you comply with all the terms and conditions listed on the “Returns and Refunds” page.
Sisters Republic UK

Made with ORGANIC cotton

All our fabrics, laces, and elastics are either certified organic cotton or OEKO-TEX standard 100 (the same as for newborns). They are therefore guaranteed to be free of any substances that are harmful to the body and the environment.
Sisters Republic UK

2,275 tampons saved

A single pair of Sisters Republic panties lasts from 5 to 7 years if you take good care of them. And in 7 years you'll have saved 2275 tampons: 5 tampons/d over 5d of periods, 13 times in the year (365/28 = 13) over 7 years = 2275. Ain't life grand 🌞? Obviously, you need several panties for one cycle, but this is just to give you an idea of the savings you can make for your wallet and for the planet.

why choose sisters ?

Sisters Republic UK

Free delivery from £34

Read more
Sisters Republic UK

30 days to change your mind

Read more
Sisters Republic UK

Made with ORGANIC cotton

Read more
Sisters Republic UK

2,275 tampons saved

Read more
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The menstrual guide

What are your tips for a first try?

For the first time, we advise you to try out menstrual panties at home, starting from the 3rd day of your period. Then, if all goes well, and you feel comfortable, go and use your panties at work or school all day long, even on the heaviest day if you don't have bleeding periods (copper IUD, endometriosis, hormonal imbalance, etc.)! And don't forget, for your 1st pair of panties, you can take advantage of the "Satisfied or your money back" offer, details at the bottom of the 👇🏼 website.

How do I choose my size and degree of absorption?

Regarding sizing, we're known to run true to size, so it's best to take your usual size. You can also refer to the size guide on the product pages. If you're between 2 sizes, take the larger one, as we don't like to be tight when we're on our period.

As regards the degree of absorption, as the flow changes during your period, it's best to have 2 pairs of SUPER panties for the heaviest day and night periods, MEDIUM for the middle of your period and LIGHT for the very beginning or end of your period. If you only want to take one, take SUPER (because who can do more can do less 😉 ) unless you're on a contraceptive that greatly reduces menstrual flow, in which case MEDIUM may suffice.

How long can I wear my menstrual underwear?

The vast majority of women can wear their Sisters Republic menstrual panties for 12 hours at a time, including on the day of heaviest flow. For some women who have a very heavy flow (copper sterile, endometriosis, hormonal imbalance, certain teenage periods...), it will be difficult to keep the panties on for 12 hours on the day of heaviest flow, and you'll probably have to change panties during the day to avoid the feeling of wetness. Alternatively, you could start the day with an internal protection such as a cup or tampon and end it with just the panties. In any case, even women with the heaviest flows can normally keep their panties on all day on other days.

Do I need to wear a tampon or pad in addition to my panties?

No, you don't have to use anything else, because our menstrual panties absorb the equivalent of one and a half tampons (for LIGHT versions) to 3 tampons (for SUPER versions).

However, if you have hemorrhagic periods (copper IUD, endometriosis, hormonal imbalance, certain teenage periods...) and you'd like to wear extra internal protection for safety on your heaviest day, that's obviously possible.

How does Sisters Republic ensure ethical manufacturing?

From the selection of our factories to the assembly of our panties, we are guided by a desire for transparency and the most ethical production possible. All our fabrics, laces and elastics come from the Mediterranean basin (Spain, Italy, Portugal, Turkey) and are either certified organic or Oeko-Tex-labeled, i.e. certified free of all substances harmful to the body and the environment. Our menstrual panties are designed in France, in our Paris offices, then assembled in Morocco in our BSCI-certified workshop (the Business Social Compliance Initiative is an organization that audits companies to ensure good working conditions for employees in terms of wages, vacations, safety...).

What are the delivery times and return terms?

Your order will be prepared within 24 hours. Then, in metropolitan France, delivery times are 48 to 72 hours depending on the day of the order and the shipping method chosen. Before placing your order, you will be given an estimated delivery date. For further information, please consult the "Payment and delivery" section at the bottom of the 👇🏻 website.

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Join us !

With inspiring, 0-taboos posts, sneak previews and exclusive offers, the Sisters are setting the social networks on fire... join the Sisters team!

Sisters Republic Period Panties : just like normal underwear but better

Our period underwear will help you forget you even have your period. Lightweight, odourless, ultra-absorbent and leak-proof thanks to a thin waterproof layer, you can wear them just like you would any other underwear. And with a hipster cut and pretty detailing, it looks just like your normal underwear. Whether you prefer a bikini cut, hipsters or boyshorts, there is something for every style and every outfit, from your most sexy to your most sporty. With our menstrual panties, you will feel pretty, light, comfortable and worry-free. all day and all night . Choose the type of design you like most, the size and the flow level that suits you and test our new hygienic protection for all women. This is the product you need to test out for your menstrual cycle!

Good value and environmentally-friendly period underwear

No more tampons and sanitary pads that just get thrown away every month. With Sisters Republic period underwear, you save money AND the environment every month. Zero waste - well, almost - as our period underwear is washable and can be reused for years and years. To make sure your underwear lasts, just rinse them with water right after use, then machine wash at 30°C with your usual load and let them air dry. Feel free to use a laundry net as extra protection if you wish, but its not essential. Your period underwear is mainly made of a nylon/elastane blend, a soft and resistant material often used for sportswear.

Environmentally friendly manufacture, kind to your body

The importance of intimate hygiene, feminine hygiene and hygienic protection is at the heart of what we do so all fabrics used in the making of our period underwear are OEKO-TEX standard 100 certified (the same standard used for baby clothes), which means that all our underwear is guaranteed to be free of any harmful substances or additives, both for your health and the health of the environment. So, you can feel good on both counts! It's important to us that you know what you are getting when it comes to underwear, which is often not the case with certain disposable period protection (such as tampons and pads) which have questionable components that can sometimes be responsible for irritation or even be risky for your health (just think about toxic shock, which affected 23 women in 2017, a number that has been steadily increasing in France since 1990).

Change your underwear to match your mood and your flow

Whatever your menstrual cycle looks like, whether you have a light, average or heavy flow, whether you are at the beginning, middle or end of your period, whether you want extra protection because your current method doesn't cut it, or you just want to try something different, Sisters Republic has the period underwear you need. Each of our styles comes in three levels of absorption to adapt to each woman's flow and in all sizes! So if you want to wear our skimpier bikini style at the beginning of your cycle and not worry about leaking, or our boyshorts for sports without feeling any discomfort, you can!

Multi-purpose underwear for any situation

Of course, our washable absorbent underwear can also be used for heavy discharge and mild incontinence. Use them in the same way as you would for your period, except don't worry about rinsing with water cold right after use - you can just throw them in the washing machine as they are.
With Sisters Republic, you get 100% effective, comfortable period underwear that is practical, environmentally friendly and sustainable! Choose your size, the level of absorption needed (light, medium or super) and wear underwear that truly goes with your flow!

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