FAQs & Support | Leak-free Pants

Frequently Asked Questions

Fluxies was founded in 2018, as FLUX Undies, the first brand of period underwear to land in the UK, when reusable period products were almost non existent. Our products have now become the trusted go-to for thousands of people, globally.
Whether it’s overnight protection, your first period product or incontinence underwear, we create modern and functional products that improve people’s everyday experience. No matter what solution we decide to create next, that ethos will run through everything that we do.
Fluxies is here to create unrivalled products that elevate the everyday through comfort, form and function.
We stand for comfort uncompromised.
We care about planet and people – that’s why we only work with manufacturers and suppliers that align with our ethics. We believe in empowering the people that make our products as much as the people that buy them. We work closely with our manufacturer to ensure our products are made carefully, consciously and with dignity. Learn more here.

At fluxies, sustainability is at our core. We believe in creating environmentally conscious products that are built to last, which means we look at every detail when choosing the fibres and blends that go into the products you’re wearing. Learn more about our earth-first fibres here.
We give back a percentage of sales to charities around the world that we are passionate about. Some of those charaties are Mermaids, IDAS, Freedom 4 Girls, Friends of sick children, The Princes Trust. Find out more here.

Fluxies are machine-washable and reusable leak-proof underwear — providing a more sustainable alternative to single-use disposable products. Fluxies period underwear is designed in a range of absorbencies, from ultra-light to super heavy.
Our period pants are built to completely replace single-use disposable products, with maximum comfort in mind.
Every pair of fluxies underwear features our innovative built-in technology — a moisture-wicking top layer to keep you fresh & dry, an absorbent core layer to lock in the liquid, and an outer leak resistant barrier to prevent any leaks.
Check out How our leak-free fluxies work page to learn more.
Our absorbent styles hold from 7ml (1 regular tampon) to 40ml (5 regular tampons), so there is an absorbency right for everyone.
The benefits of period underwear include:
- Eco-Friendly: Made from sustainable and reusable materials, they're gentle on the environment.
- Comfortable: Soft, breathable fabrics and a cosy fit provide all-day comfort.
- Stylish: Trendy prints and designs that boost your confidence and mood.
- Convenient: Reusable and low-maintenance, making period care hassle-free.
The materials that we use in our absorbent gusset are always black to prevent any stains from showing. Fluxies period undies are not stain-proof.
For fluxies to be stain-proof we would need to add treatments to the materials, these treatments would leave nasties and toxins in the leak-free underwear and
this is not something that we want in our naturally antimicrobial undies.

Fluxies period-proof underwear handles blood clots similarly to a pad. The undies won’t absorb the blood clot itself, they will absorb the surrounding moisture so you will stay fresh and dry.
Fluxies period underwear is super absorbent, odour controlling, and moisture-wicking, designed to keep you fresh and dry. If your underwear has not reached full capacity, we would still recommend changing once daily, as you would with regular underwear.
Our period-absorbing underwear is made from various different materials, all sustainable in their own right. The main materials we use are Tencel Modal, Organic Cotton, Recycled Nylon and
Biodegradable TPU. Find more about the materials we use in our products here.

We have size charts for all of our different styles of fluxies underwear. The size charts can be found on the individual product pages.
Our period underwear styles feature a range of absorbencies, from ultra-light (7ml/1 tampon) to super heavy (40ml/5 tampons), so there is a pair for your every need. Our light absorbencies are great for end days and spotting.
For some, our moderate absorbency styles can be a replacement, and for others, they can be a backup to tampons or menstrual cups on heavier days.
Heavy and Super Heavy styles replace all other period products and are also great for overnight use!
Yes, we designed a product specifically for overnight leaks. Our fluxies sleep shorts are a boxer short style that hold up to 5 tampons' worth of flow. The gusset goes from front to back, to give you maximum protection, all
night long. Shop here.
We don’t recommend using fluxies period pants to swim in. We designed a product specifically for swimming. The water-resistant outer material allows water to simply roll off, keeping you fresh and dry all day long, whether you’re going for a dip or simply laying poolside. You can shop our period swimwear instead.

We recommend using a product from our seamless range. These undies are designed to keep VPLs at a minimum. Shop for Seamless period absorbing underwear here.
Fluxies can provide leak protection you can trust through postpartum, for the best fit during postpartum, we recommend sizing up and opting for a heavy or a super heavy absorbency.
Build a bundle sets are a great way to build your collection and get more for less. Mix and match any styles, colours, and sizes across fluxies, fluxies teen and fluxies incontinence. Find out more here.
Our incontinence range is specifically designed for bladder leaks. Find out more here.

Fluxies are a total replacement for disposable products, such as pads, tampons, liners, and cups. Our highest absorbency styles hold up to 5 tampons. For most flows, fluxies can last all day! Alternatively, you can use fluxies period underwear alongside a tampon/cup.
You can wear fluxies period-absorbing underwear for as long as your flow will allow. Every flow is different and the type of absorbency that you choose will affect how long you can wear your fluxies for. We do recommend that you change your period underwear daily, just as you would with normal underwear.
A good indication of your fluxies period-absorbing underwear becoming full is if you start to notice blood at the seams, this is a good time to change.

No, not at all. Our period underwear is designed to be discreet, looking and feeling just like regular underwear, with no visible lines or bulkiness.
We recommend starting with 3-7 pairs of fluxies period pants, so you’re covered for your entire period. It’s also a good idea to use a few pairs to work out how heavy/light your flow is and which
products suit your needs best.
No we do not recommend this. Fluxies leak-free underwear are designed to absorb your leaks, worn alone. If a pad is used and you leak, the blood/pee will not go through the pad, and will instead leak off of the sides of the leak-free underwear & they will not get a chance to do what they are designed to do.

Fluxies are super easy to care for; Rinse them under running water until they run clear, throw them in with the rest of your washing and put them on a 30C wash cycle. Don’t use any fabric softener or bleach. And then hang your leak-free undies to dry!
Machine-wash your fluxies up to 30C. If you're hand-washing, the water should feel luke warm.
Yes, alternatively you can hand wash your fluxies leak-free underwear.
Yes, all fluxies made from Tencel modal/Organic Cotton are also biodegradable. Firstly, wash your fluxies, then cut out the inner absorbent layer and dispose of this textile. The Tencel/cotton body, and the TPU waterproof layer can then be thrown in the compost to biodegrade.

The drying time of our leak-free underwear depends on the absorbency. The moderate styles take approximately 10 hours to dry, and the super absorbency styles can take about 18 hours to dry under non-humid conditions.
Drying times will be affected by humidity levels and the airflow of the space you hang them in. For quicker drying times, we recommend drying in the sun, or over a dehumidifier.
Never tumble dry – this will damage the waterproof layer within the gusset.
If you have left the undies wet for too long or the absorbed blood has built up in the gusset, this may cause an odour or affect the performance of your period pants. If your fluxies needs a little love, try a vinegar soak.
Before machine washing your fluxies, soak them in the sink with one cup of white vinegar and some warm water. Leave them to soak for about 30 minutes, then throw them in the washing machine.
No, using fabric softener can damage the absorbent technology. Fabric softener works by coating the yarns of fabric to make it feel softer. Over time, this will make the gusset becomes less absorbent.

Fluxies is available to buy on our website and at several health stores & pharmacies. To shop fluxies in person, check out our store locator to find a store near you.
We accept all major credit/debit cards, Amazon Pay, Apple Pay, Google Pay, Klarna and fluxies gift cards.
We accept most local currencies. If we do not offer your local currency; you'll have the option of checking out in GBP, USD, or EUR. Receipts and emails will show the purchase price in GBP.
As soon as your order has been picked & packed and the shipping label has been applied you'll receive an email confirmation with tracking details so you can keep an eye on the progress.
Our fulfilment centre is based in Northampton, UK

Yes! We ship to many countries around the world! Please check our Shipping to view our shipping rates.
All of our product packaging and mailer packaging is paper and boards and FSC-certified. It is 100% recyclable. Our paper packaging also uses soy based inks and eco certified glues.
We collect VAT for countries in the EU, for orders less than £150, so there will be no surprise tax and duty bills.
For order over £150, no VAT will be charged on your order, however, you will then be responsible for any Taxes and Duties.
Orders are processed pretty quickly, but we will do our best
to make any changes. The best way to request a change/cancellation is to send us an email as soon as possible to support@fluxies.co.uk.
We will do our best to accommodate any requests you may have. If your order has already shipped, please visit our Returns & Exchanges within 30 days.

It takes 24-48 hours for your return to be processed. After that, your exchange will ship out to you.
We accept returns within 30 days of receiving your goods. Find out more about returns here.

Your exchange will still be accepted and the exchange order will be processed, as soon as the restock arrives, your order will ship.
No, our gift cards never expire.

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