Mix and Match - Buy 2 Get 1 FREE. Add 3 items from the collection and get cheapest free. Shop Now

Skip to product information
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
Regular price  $73.00 Sale price  $59.00 Saving 19%
4.7

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
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.

Free Shipping

We want you to love your WUKAs. UK orders usually arrive within 3–5 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: 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.
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

Customer Reviews

Based on 259 reviews
82%
(212)
10%
(26)
5%
(12)
3%
(7)
1%
(2)
K
KG
Great find!

Super comfy, feel secure and confident.

E
Eleanor S.
Comfiest pants I own!

I was sceptical about how these would fit seeing as they can fit 4 sizes in one bracket, but oh my gosh these are the comfiest period pants! Probably the comfiest pants full stop! They really are seamless, stylish and definitely do last up to 12 hours comfortably.
These are better than any other brand I've tired and are well worth the money. I'd recommend and I'm certainly going to be buying more!!!

M
Miriam H.
Second purchase after using my previous ones for

Second purchase after using my previous ones for four years and counting! Not retiring them as there's nothing wrong with the originals at all just needed a few more pairs. Really really recommend