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Super Heavy
SUPER HEAVY
FLOW
Female model wearing WUKA Stretch™ Super Heavy Period Brief in black, showcasing a mid-waisted fit and seamless comfort.
  • Super Heavy
    SUPER HEAVY
    FLOW
    Female model wearing WUKA Stretch™ Super Heavy Period Brief in black, showcasing a mid-waisted fit and seamless comfort.
  • Super Heavy
    SUPER HEAVY
    FLOW
    Close-up of WUKA Stretch™ Super Heavy Flow Brief worn by model, highlighting leak-proof and absorbent period underwear design.
  • Free Shipping · 100% Happy Guarantee · Try for 40 days
  • Rear view of WUKA Stretch™ Period Underwear in black, showing full coverage and smooth finish for sleep comfort.
  • Side view of WUKA Stretch™ Super Heavy Period Pants, designed to fit up to four sizes with high-stretch fabric.
  • Demonstration of WUKA Stretch™ Period Underwear's super-stretch waistband, fitting a wide range of body sizes comfortably.
  • Product close-up of WUKA black period pants, showing seamless front panel and logo detail.
  • Infographic highlighting features of WUKA Stretch Midi Briefs for super heavy flow: super-fast absorption, 12-hour leak-proof protection, and flexible fit across up to 4 sizes. No pads. No tampons. Just these.
  • Lifestyle shot of model in seated position wearing WUKA Stretch™ Super Heavy Period Pants, ideal for overnight wear and maximum comfort.
  • Female model wearing WUKA Stretch™ Super Heavy Period Brief in black, showcasing a mid-waisted fit and seamless comfort.
  • Close-up of WUKA Stretch™ Super Heavy Flow Brief worn by model, highlighting leak-proof and absorbent period underwear design.
  • Rear view of WUKA Stretch™ Period Underwear in black, showing full coverage and smooth finish for sleep comfort.
  • Side view of WUKA Stretch™ Super Heavy Period Pants, designed to fit up to four sizes with high-stretch fabric.
  • Demonstration of WUKA Stretch™ Period Underwear's super-stretch waistband, fitting a wide range of body sizes comfortably.
  • Product close-up of WUKA black period pants, showing seamless front panel and logo detail.
  • Infographic highlighting features of WUKA Stretch Midi Briefs for super heavy flow: super-fast absorption, 12-hour leak-proof protection, and flexible fit across up to 4 sizes. No pads. No tampons. Just these.
  • Lifestyle shot of model in seated position wearing WUKA Stretch™ Super Heavy Period Pants, ideal for overnight wear and maximum comfort.
WUKA Stretch Midi Brief - Super Heavy
Stretch™ Period PantsSeamless Midi Brief
£18.33
4.6

Size Chart

 

STRETCH & DRYTECH SIZE GUIDE

Fits 4 sizes in one underwear for a perfect fit first time!

SIZES
Size 1
Size 2
Size 3*

Universal

XS, S, M, L

L, XL, 2XL, 3XL

3XL, 4XL, 5XL,

UK

6, 8, 10, 12, 14

14, 16, 18, 20

20, 22, 24, 26

EU

34, 36, 38, 40, 42

42, 44, 46, 48

48, 50, 52, 54

USA

2, 4, 6, 8, 10

10, 12, 14, 16

16, 18, 20, 22

Hip (cm)

85-105

105-120

120-135

*Not all products are available in size 3

How to Measure Your Hip Size

Adult Stretch period underwear size chart showing how to measure chest, underbust, waist, hips, and leg opening for a perfect WUKA fit. Find your ideal size first time with stretch-fit leakproof comfort

WUKA TIP: No tape measure? 
You can measure yourself with a belt or dressing gown cord and a 30cm ruler! Tie the belt around your hips, place a piece of tape or pinch where it reaches, then lay flat and carefully use the ruler to measure the length.
Choose Size
Pack Size
Fits 4 Sizes
Fits 4 Sizes
Leakproof & Breathable
Leakproof & Breathable
Midi Style
Midi Style
Reusable 2 Years
Reusable 2 Years
Mid Height Gusset
Mid Height Gusset

WHY YOU’LL LOVE IT

The world’s first seamless, multi-size period pants. WUKA Stretch™ Full Briefs are designed to flex with your body through bloating and any activity you throw at them. Soft, secure, and figure-flattering with no VPL – they give you maximum protection without compromise.

HOW IT WORKS

Made with Stretch™ Microfiber Technology that adapts to fit across 3 sizes in one pair. The mid gusset offers full coverage with super-fast absorption. Absorbs up to 60ml of period blood – the equivalent of 12 tampons or 8 pads – with leak-proof layers that keep you dry and comfortable for up to 12 hours.

BEST FOR

Super heavy flow days, overnight protection, postpartum recovery, or whenever you want maximum security and comfort. Perfect for changing body shapes without the need to size up or down.

GOOD TO KNOW

Seamless construction for an invisible fit under clothes. Made from breathable cotton and hypoallergenic fabrics that are kind to skin. Wash before first wear. Reusable for up to 2 years, saving hundreds of disposables. Eco-friendly, flexible, and built for real life.
Free Shipping

We want you to love your WUKAs. UK orders usually arrive within 2–5 working days (express options available), and international shipping is fully tracked from just £5–£10 via FedEx. For our EU customers, we also collect VAT upfront to avoid any surprise fees on delivery.

If it’s your first pair, you’re protected by our 100% Satisfaction Guarantee — try one on, and if it’s not the right fit, you can return or exchange within 40 days. All other items must be unworn and in their original packaging. Once we receive your return, refunds are processed within 10 working days.

See our Shipping Cost and Returns & Refund Policy.
Wash and Care

Rinse, Wash at 40°, air dry inside out. Tested to 54 washes.
Composition

Outer : 80% nylon, 20% elastane
Middle: 80% polyester,20% elastane Breathable TPU
Inner: 92% polyester. 8% spandex

FAQ: Stretch™ Midi Brief - Super Heavy

Stretch™ Midi Brief Super Heavy provides up to 12 hours of protection with adaptive multi-size comfort and a no-VPL finish.

How much blood do WUKA Stretch™ Midi Brief Super Heavy pants hold?
Our WUKA Stretch™ Midi Brief Super Heavy absorbs up to 60ml of period blood, equal to 12 tampons or 8 pads.
What makes the Stretch™ fabric special?
The patented Stretch™ fabric adapts to your body shape for a secure multi-size fit without digging in.
Can I wear them overnight on my heaviest days?
Yes, they are suitable for both daytime and overnight wear, providing up to 12 hours of leak-free protection on very heavy flow days.
Will they show under clothing?
The midi brief cut offers a balance of coverage and comfort, with no VPL under everyday outfits.
How do I wash and care for them?
Rinse in cold water after use, then machine wash at 40°C without fabric conditioner. Air dry only to maintain absorbency.
How long will they last and how many pairs do I need?
Each pair lasts up to 2 years, helping you save money and reduce waste. Most customers use 5–7 pairs for a full cycle rotation.
2024 Health & Wellbeing Awards Gold Winner Badge – recognising WUKA for excellence in health and sustainable period care
Beauty Shortlist Mama & Baby Awards 2024 Winner Badge – celebrating WUKA’s award-winning products for expecting and new mums
Our Stretch Super Heavy Period Pants take home the silver-award at the Green Parent Natural Beauty Awards 2025 for best menstrual care product
WUKA Perform Period Swimsuit wins best value cross-training kit at the Women's Running Awards 2023
Our High Waist Black Seamless Stretch – Super Heavy Flow period-proof underwear wins best period pants at the Beauty Shortlist Wellbeing Awards 2025
WUKA were finalists at the Pure Beauty Global Awards 2025
We won Gen M Award Winner - Breakthrough Partner for our seamless DryTech™ Incontinence light leaks underwear
The WUKA Postpartum Stretch™ set has been voted Best Postpartum Wellness Product for 2025 by The Positive Birth company

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Customer Reviews

Based on 10 reviews
70%
(7)
20%
(2)
10%
(1)
0%
(0)
0%
(0)
L
Libby
These are great period pants

These are great period pants. My 11 year old started her periods last Christmas so I bought her some Wuka pants to try. She finds the Basics bikini range so comfortable that she now wears these every day of the month. The super heavy flow teen stretch are brilliant on her heaviest days. I’ve been so impressed that I’ve started buying various pants for myself. Unfortunately I’ve had to return 2 pairs so far this year - 1 was not the right fit/shape for me, and 1 was unraveling at the seam. BUT both times the customer service was exceptional (Sabina & Prava - thank you!). I highly recommend these pants & this company.

J
Julia
Comfortable to wear, not efficient in my case.

Comfortable to wear, probably can absorve high amount of blood. Unfortunately it didn’t work for me due to having big blood clots in my period which leaked through within half an hour. It was on one of the lightest days of my period (last day) and I mistakenly thought I wouldn’t need the menstruational cup if I wear a period pant of this strength. I believe this could be different for those who don’t pass big clots.

B
Bee
Best for all day

I work in a hospital and suffer badly with super heavy flow day 1. In the past, I often didnt get a chance to change pads and leaked through but these pants have genuinely been the best thing I've ever tried! I won't go back to pads. Even when I get a bit sweaty between my legs from moving, the material means it doesn't absorb the sweat and cause leakage like other brands I've tried. Bring on the long shifts!

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