NuStretch Brief - One Size
Moderate to Heavy Absorbency
In partnership with experts in microfibre technology, our new patent-pending one-size underwear is made using our revolutionary NuStretch® fabric, stretching across multiple sizes and moulding to every body type, while retaining stretch perfectly. Our reliable built-in leakproof tech absorbs all life's leaks — from periods to incontinence.
Our patent-pending design is perfect for changing body sizes and gives you confidence through periods, incontinence, and post childbirth. Our breakthrough seamless material is not only comfortable, but it's also soft, breathable, and guarantees no VPL.
Available in two sizes:
One fits sizes UK 6-14, One+ fits sizes UK 16-30
- Perfect first-time fit guaranteed
- NuStretch ® fabric — moulds to every body
- Super absorbent — perfect for moderate to heavy flows
- No VPL — soft, breathable, and seamless design
- 100% leakproof — wear for up to 12 hours
- Reusable and washable — eco-friendly protection
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Certified vegan and cruelty-free
Our period-proof underwear combines cutting-edge technology with ultimate comfort. Here’s how it works:
Multi-Layer Protection: Our underwear features a unique multi-layer system designed to keep you dry and comfortable all day.
- Moisture-Wicking Layer: Quickly draws moisture away from your body to keep you feeling fresh.
- Absorbent Core: Locks in fluid, providing reliable protection against leaks.
- Leak-Resistant Barrier: Prevents any leaks, so you can move with confidence.
- Breathable Fabric: Ensures airflow to keep you cool and dry.
Machine wash max 40°C with mild detergent, hang to dry. No bleach. No tumble dry.
BODY: 95% Organic Cotton, 5% Elastane
GUSSET LINING: 95% Organic Cotton, 5% Elastane
GUSSET:100% Microfibre, Biodegradable TPU
Our underwear has no added PFAS, and has been successfully tested for harmful substances and certified according to STANDARD 100 by OEKO-TEX®️.
Learn more about how to care for period underwear.
UK Bound? Lucky You!
Enjoy free shipping on us, on all UK order over £30! Need it quick? Pick next day delivery at checkout.
Order before 12:00 pm GMT on a working day (that’s Monday to Friday), and we’ll send out your goodies on the same day. Talk about speedy service!
Not in the UK?
No worries! We’ve got free worldwide shipping on orders over £75. Plus, you can speed things up with express shipping options at checkout.
Returns Made Easy
Didn’t hit the jackpot with your purchase? No sweat! We’ve got your back with hassle-free returns and exchanges for 30 days. And if our products don’t live up to the hype (spoiler: they totally will!), we’ll refund you within 60 days*. Yep, we’re that confident! 🚚✨
* Try fluxies risk-free on your first order. If our undies don't work as promised, let us know within 60 days and we'll refund you. The 60-day risk-free trial applies to one worn pair of undies only.
NuStretch
Our patent-pending NuStretch undies are the world's first seamless, one-size leak-proof underwear designed to adapt to every body perfectly, while retaining shape and stretch.
Feel: buttery soft
Stretch: up to 400%
Breathable and ultra-soft
Reusable and washable
100% leakproof for up to 12 hours
fresh and dry odour control
Designed to adapt to every body.
Working with experts in micro-fibre tech, our softest underwear yet stretches up to 400%, fitting across multiple sizes perfectly. One size really does fit all.
Absorbs all of life's leaks.
Our upgraded built-in technology is designed to absorb all types of leaks, giving you protection for periods, incontinence and postpartum. It's kinda magic.
Your questions, answered.
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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 different absorbencies, from ultra-light to super heavy. Our period pants are built to completely replace single-use disposable products, with maximum comfort in mind.
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Yes! Our period underwear can be worn alone as a complete replacement for pads, tampons or cups. With absorbencies from light to super heavy, you can find a style that suit your flow and can be worn all day, leak-free!
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You can wear fluxies period-absorbing underwear for as long as your flow will allow. Every flow is different, and the type of absorbency you choose will affect how long you can wear your fluxies for.
We do recommend you change your period underwear daily, just as you would with regular underwear.
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Our new one-size leak free underwear is available in One which fits UK sizes 6-16 and One+ which fits UK sizes 18-30.
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fluxies NuStretch One-Size Period Pants are made from micro-fibre and elastane, a super soft material that offers you protection and coverage from all life's leaks.
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Absolutely not! We have always focused on creating products that are safe for the environment and end-users (you!). We partner with manufacturers that regularly carry out testing, and in addition, we conduct independent, third-party testing by UK company Bureau Veritas. We are pleased to report that no detectable levels of PFAS have been found in fluxies period underwear.
Since launching five years ago, we have never added stain-resistant or water-resistant chemicals to our products. Instead, we choose fabrics with inherent moisture wicking, absorbing, and leakproof qualities, so they don't need chemical treatments which can contain PFAS.
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