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Super Heavy
SUPER HEAVY
FLOW
WUKA Stretch™ Super Heavy Flow Period Pants 2 Pack with Wet Bag – Leak-proof and ultra-absorbent reusable underwear for heavy periods and overnight protection.

Stretch™ Period PantsSleep Set 2 Pack

691,00 kr
4.7

Size Chart

 

STRETCH & DRYTECH SIZE GUIDE

Fits 4 sizes in one pair of 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

12, 14, 16, 18

18, 20, 22, 24

EU

34, 36, 38, 40

40, 42, 44, 46

46, 48, 50, 52

USA

2, 4, 6, 8

8, 10, 12, 14

14, 16, 18, 20

Hip (cm)

85-100

100-115

115-130

*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 options

Heavy
Super Heavy
Choose Size
Fits 4 Sizes
Fits 4 Sizes
Leakproof & Breathable
Leakproof & Breathable
Seamless No VPL
Seamless No VPL
Reusable 2 Years
Reusable 2 Years
Mid Height Gusset
Mid Height Gusset
Midi Style
Midi Style

WHY YOU’LL LOVE IT

These Stretch™ undies have you fully covered. Designed to feel like your favourite seamless underwear with built-in protection that lasts up to 12 hours. Just sleek, seamless comfort you can trust through the night.

HOW IT WORKS

A multi-layer gusset absorbs up to 60ml (about 12 tampons or 8 pads worth) with fast-wicking Coolmax tech and a waterproof layer to stop leaks in their tracks. Our signature Stretch™ fabric flexes with your body—even as your flow and bloating change through your cycle.

BEST FOR

Heavy flow days. Overnight protection. Travel, work, or anytime you’re on the go and don’t want to stress. These are the briefs that show up, so you don’t have to worry.

GOOD TO KNOW

Wash before first wear. Reusable for up to 2 years—saving around 200 disposables. Seamless and breathable. And made for real life.

Shipping

UK orders usually arrive within 3–5 working days (Express options available), and international shipping is fully tracked from just £5 – £10 via Royal Mail. 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% Polyamide, 20% Elastane
Middle: 95% Cotton, 5% Elastane,
88% Polyester, 12% Elastane, TPU
Inner: 95% Cotton, 5% Elastane,
95% Polyester, 5% Elastane

FAQ: Adult Sleep Set Stretch™ Super Heavy

Designed for maximum absorbency and comfort overnight, with two pairs that adapt to your body for up to 12 hours of leak-free protection.

How much blood do the Adult Sleep Set Stretch™ Super Heavy pants hold?
Each pair in the Adult Sleep Set Stretch™ Super Heavy absorbs up to 60ml of period blood, equal to 12 tampons or 8 pads.
Are they suitable for overnight and very heavy flow?
Yes, they are designed especially for overnight wear and super heavy flow days, providing up to 12 hours of leak-free comfort.
What makes the Stretch™ fabric different?
The patented Stretch™ fabric adapts to your unique body shape, expanding and contracting for a perfect fit without digging in, even while you sleep.
What Gusset Style are Stretch™?
All stretch™ period underwear come with a mid-height gusset
Do I need extra pads or tampons with these?
No, these pants are made to completely replace pads and tampons, even on your heaviest nights.
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 and prolong their life.
How long will they last and how many pairs do I need?
Each pair lasts up to 2 years. With the 2 pack, you’ll have reliable overnight protection ready for rotation, though many customers find 5–7 pairs cover a full cycle.
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

You may also like

  • 5 stars: 282 (83%)
  • 4 stars: 35 (10%)
  • 3 stars: 12 (4%)
  • 2 stars: 7 (2%)
  • 1 star: 2 (1%)
Some of the reviews shown are from related products the merchant grouped with this one.
J
Jules B.
Making periods manageable!

Making periods manageable! I transitioned to period underwear about two years ago and love the Will brand more than other brands. Comfortable and lightweight. Protects me and makes me feel reassured even on my heaviest days. Have even recommended to friends and family members!

A
Antoinette S.
I don’t even like thongs

I never wear thongs as in typically find them uncomfortable for a variety of reasons. But I was looking for a light day pair of underwear that I could easily wear under my workout leggings, so decided to try them.

Being in perimenopause, my unpredictable period days has me making these my go-to everyday underwear. They are so cozy and fit so well.

A
Anonymous
Really comfy and well priced!

Honestly such a great purchase. I have been wanting to buy period underwear to use alongside tampons when I have really heavy days as I used to use a pad with a tampon, but it felt so uncomfortable and would rub against the insides fo my legs. But the wuka period underwear has helped me so much, and when I rinse them out before washing them I am amazed at how much they hold because you would just never know due to their good absorbency. And so many brands of period underwear are really expensive for about £25 or £30 a pair, but these are much more affordable and will last. Already bought another few pairs!

R
Rachel B.
Why didn’t I buy them earlier!

I bought these on a bit of whim as my period was due to start when I was travelling for holiday and I wouldn’t have the opportunity to stop and change my pads. These were amazing. Really comfortable, no leaks no worries and lasted the 9 hrs we were travelling no problem. I have very heavy periods and I was worried if they would contain everything but they did and there was no smell or uncomfortableness. These have literally been a game changer for me.

N
Natasha
This has been a change I wish I made sooner

This has been a change I wish I made sooner. Having purchased for my daughter I made the plunge to try myself. I couldn’t believe how comfortable they were and how much changing sanitary products often because my flow is so heavy impacted how I felt. These have given me peace of mind going to bed at night knowing I can sleep through and won’t have leaked through. I can’t recommend enough.

J
Jean T.
These are so nice

These are so nice comfortable

A
Anonymous
Summer

Great colour for summer wear quality as excellent as ever with Wuka

A
Alisha l.
Don't let ur period box u in!!

Simply amazing felt safe secure inside my head more than anything. Fitted perfectly i am a small i have found wuka sizes just right for me along with the level of protection against leaks what's not to like about these boxers??

J
JULIA k.
Simply the Best

Awesome pantees I can't fault them great coverage. Wearing these gave me the confidence to wear a white suit at work I felt soooooooooo confident knowing that I was protected from leaks all day long!!

A
Alishalovesocket
A period thong u say??I would never have

A period thong u say??
I would never have believed it but this works amazingly well. Wore this to my brothers wedding i felt safe & secure and didn't have to worry about leaks especially as the dress was very very short. Every thing was contained and no problem!! Thank u 💓 Alisha lovesocket

A
Anonymous
Great for period, ok for fitting! Can improve there

Great and very leak proof for a thong, do roll up on the hip though if you’re a bit bigger, overall love the Wuka stuff though!

A
Anonymous
Comfortable for horse riding and manual work

I currently have to wear period underwear every day just in case due to bleeding being all over the place and with no warning or other symptoms. These are very comfortable and fit well and seem to wick sweat away so they are not making me sore. Can’t give 5 stars as not yet had a bleed whilst wearing but very happy so far.

D
Danni G.
Love Wuka, my last pair lasted 4 years!!! And

Love Wuka, my last pair lasted 4 years!!! And that was with tumble drying them (I know it says not to but tbf they still lasted ages!)

C
Catherine M.
Great Pants

Great Pants. Super comfy

N
Nastado
Period pants changed my life

Period pants changed my life. It’s a revolution for girls of today and I wish I had them when I was younger. You feel secure and dry throughout the day and they clean really well. Highly recommend.

L
Lauren
Great pants but beware of sizing

Excellent coverage. I’m a size 12 (M) and chose the XS-L but they are only just big enough. If you’re a size 12 or up I would consider the next size.

A
Anonymous
Light, stretches well, absorbs

Light, stretches well, absorbs well

J
Jessica L.
Very

Very good

A
Anonymous
Great quality just to small for me

I recieved these pants they are well made . Sadly fjor me they felt tight so I gave them to my daughter who hasn’t worn yet . Iam a 10-12 but think the medium fit a 10 better . I am a small 12 . I will order the larger ones as I like the quality .

A
Am
Incredibly comfortable, would definitely

Incredibly comfortable, would definitely recommend

A
Anonymous
I use these for running

I use these for running (stress incontinence) and they work brilliantly

A
Anonymous
Great for daughter

Great for daughter. Would of liked no branding on outside

P
Philippa F.
These fit perfectly and are so secure

These fit perfectly and are so secure. I’m extremely happy with them.

M
Moira P.
Feel really nice on, comfortable and silky smooth

Feel really nice on, comfortable and silky smooth. Good bum coverage. Still debating if to go down a size.

A
Anonymous
Incredible! Can wear them all day

Incredible! Can wear them all day. No leakage, no uncomfortable feeling during wear. Revolutionary!

Z
Zamzam
I have been using wuka pants for over 2 years and

I have been using wuka pants for over 2 years and omg they are the best I feel so comfortable and confident that they will never leak. I always hand wash them and they have lasted me a long time. My period pain has decrease dramatically. And I can't feel anything. It's free bleeding with confident and I am so happy j made this purchase. Best decision i have ever made. I have tired other brand but let me tell you you can feel and see a huge difference with Wuka pant. They have not failed me at all no leak or smell and its 2 years running. Thank you so much life changer♥️

C
Charlotte H.
I gave these the ultimate trust and wore them hiking

I gave these the ultimate trust and wore them hiking across my entire period. I was worried about the sizing but they stretched to fit and felt really comfy. I really like the fabric, they feel much nicer than my other pairs and I like the high waist - I have lower fit ones and they make me feel so uncomfortable. They absorbed everything, held out whilst hiking mountains for hours and I never felt a single leak. Also love that there's no PFAS, so so important to me!!

C
Claire C.
I've had my period pants from WUKA Adult Sleep

I've had my period pants from WUKA Adult Sleep Set Super absorbant in black but I haven't used them yet but I'm super they'll be super comfy and they feel really nice to most definitely recommended and worth five stars and the money.

A
Anonymous
Wuka Thong

Perfect. Comfortable. No VPL. Highly recommend

A
Anonymous
Comfortable and secure

Comfortable and secure. Just what I needed

L
Laura K.
Best period pants I’ve had so far

Best period pants I’ve had so far. They feel very secure, not too bulky and nice and flexible. I have very heavy periods so still had to use tampons as well as these for the first day or two, but felt confident only wearing the knickers for the last few days.