Period underwear that is comfortable
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Period underwear that is comfortable

What is period underwear? (or "washable absorbent underwear", "menstrual underwear")

Sisters Republic period underwear is underwear that looks and feels just like normal underwear, but better because it is made of high-tech fabrics that allow you to go through your period without the risk of leaks or odours, or even the feeling of dampness. Though they look just as nice as your usual lingerie and are almost as thin (between 2 and 3 mm thick max), there is integrated hygienic protection at the crotch. You won't be able to see it, and you can almost not feel it, but rest assured, there are 2 to 3 thin layers of highly absorbent and waterproof fabric hidden in there (depending on the level of absorption you have chosen):

  • ultra-absorbent, antibacterial cotton that quickly drains the liquid inside and wicks away surface moisture, preventing any odour or feeling of dampness
  • waterproof fabric (a mixture of cotton and polyurethane) that blocks the liquid and prevents leaks and stains

period underwear

Comfortable and clean period underwear

Our period underwear is made of organic cotton for extra comfort down there, making sure there is no irritation or itching caused by synthetic materials. We had to use layers containing polyurethane, which is currently the only solution available to make a waterproof fabric. This protection does not contain harmful substances, and unlike tampons and sanitary pads, it does not expose you to the risk of toxic shock. Sisters Republic products are Oeko Tex certified, a label that guarantees the absence of material that is toxic to the body or the environment. The material is breathable and anti-bacterial: no risk of a bad smell in the middle of the day!

Our period underwear has multiple benefits compared to  other hygienic protection. Because of how thin they are, they are much less noticeable than if you were wearing a pad, all while ensuring good moisture absorption. Even heavier flows are taken care of if you choose the right level of absorption. Depending on the level you choose, the lining of our underwear can absorb the equivalent of 1 to 3 tampons, whilst never exceeding 3 mm in thickness.

With our period underwear, you can go for up to 12 hours without the fear of leakage, odours or dampness. Just make sure you choose the right underwear for your flow! For example, try something with "Super" absorption if you are at the beginning of your period and/or if your flow is usually heavy. If you are at the end of your period or if you generally have a light flow, you can go for "Light" absorption, which will be less thick and therefore more comfortable. Finally, if you have a really heavy flow, we recommend using your period underwear in addition to other protection, such as a tampon or a pad just to make sure you are 100% protected.

Elegant underwear, suitable for all women

Our underwear is suitable for all women: from young girls just starting their first period, to women with a regular flow, tall women or those with relatively narrow hips, for the first days of your period or throughout your entire cycle. We have several styles, all equally comfortable, from ordinary cotton briefs to boy shorts, with linings which suit all kinds of flow, or high leg style with a slimming effect.

Our period underwear is easy to put on - just like your regular underwear. No wings to stick down, no need for an applicator. And so comfortable, you'll forget you are even wearing them, so you can concentrate on what really matters. Stay looking and feeling your best thanks to the flattering cuts and cute details like lace and mesh. Don't worry about what outfits you can wear during your, period:our period underwear sits smoothly under even the tightest jeans or skirts. They even work well with sportswear, so stop letting your period get in the way of working out, unless you really can't. As far-fetched as it may seem, your period doesn't have to be a downer if you have good period underwear. It's a shame the same cannot be said for other forms of period protection!


Sisters Republic period underwear is effective, even while you're doing sport
choose your style


Multi-purpose hygienic protection

Some people even use Sisters Republic absorbent underwear to combat vaginal discharge or light bladder weakness. Using absorbent underwear can help you get through the day with peace of mind.

Our underwear can also be used postpartum, as you continue to bleed after delivery. Use them to keep you comfortable and dry while you are still bleeding.

For women entering menopause, period underwear is a great way to prepare for the unexpected. The same can be said for young women who still have irregular cycles and don't want to be caught out.

You can also use your Sisters Republic underwear if you're about to start your period and don't want to risk being caught off guard. Basically, no matter the situation, your Sisters Republic underwear can be a great help and save you any hassle, while making you feel good and providing you with maximum comfort.

Cost-effective and easy to maintain period protection

Our underwear is washable, reusable and easy to care for. After you take them off, just rinse under cold water until the water runs clear, then machine wash them as usual, without bleach or fabric softener. You can then leave them to air dry, saving by energy on not tumble drying. For those who are looking for zero waste and environmentally friendly solutions, period underwear is the best form of feminine hygiene protection for you. It's a win-win! 

Your period underwear can last you more than three years if you take good care of them. That is part of what makes them so economical. Calculate how much money you would spend on disposable protection for your period over that time, and you'll soon see how much you can save.  The initial cost may seem high, but it is an investment, not just financially but for the planet, especially when you think of the enormous costs related to the production and disposal of single-use sanitary products.

In short, period underwear has many advantages:

  • able to absorb your menstrual bleeding effectively, avoiding any unpleasantness 
  • protects you from infection that can be caused by some hygienic protection
  • allows you to spend your days worry-free, no matter what you're doing 
  • helps prevent any unexpected accidents during your period 
  • brings you comfort and peace of mind 
  • saves you money by minimizing your period-related costs 
  • generates little to no waste
  • contributes to preserving the planet through responsible manufacturing and use


 During your period, go with chocolate for support and your Sisters Republic period underwear for comfort


Payment with or without account creation

<p><strong>Free delivery</strong> on orders over £34</p>

Free delivery on orders over £34

<p><strong>Satisfied or refunded</strong> for 60 days</p>

Satisfied or refunded for 60 days

<p><strong>Free 3X</strong> payment</p>

Free 3X payment

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