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Heavy
HEAVY
FLOW
Woman wearing WUKA Stretch™ Boxer Period Pants in black, full-length front view, designed for heavy flow and offering a comfortable, seamless fit.

Stretch™ Period PantsSeamless Boxer Short

€25,95
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

Black
Light Nude
Size
Pack Size
Fits 4 Sizes
Fits 4 Sizes
Leakproof & Breathable
Leakproof & Breathable
Mid Height Gusset
Mid Height Gusset
Reusable 2 Years
Reusable 2 Years
Boxer Style
Boxer Style

WHY YOU’LL LOVE IT

WUKA Boxer Shorts are designed to feel as comfortable as your favourite loungewear, while giving you complete peace of mind on heavy flow days. With a low-rise fit and extra coverage, they’re soft, secure, and made to move with you with no odour and no stress.

HOW IT WORKS

Built with our signature Stretch™ fabric and a wide gusset that moulds to your body, these boxers stay smooth under clothing and never dig in. Absorbs 20ml+ of period blood – about 4 tampons’ worth or 3 pads, with super-fast absorption that keeps you feeling dry and confident.

BEST FOR

Heavy flow days, overnight wear, working long shifts, or lounging at home. Perfect pairing for skirts and dresses. 

GOOD TO KNOW

Wash before first wear. Reusable for up to 2 years, saving hundreds of disposables. Breathable, hypoallergenic, and designed for real life comfort.

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 88% Polyester, 12% Elastane, TPU
Inner 95% Organic Cotton, 5% Elastane,
95% Polyester, 5% Elastane

FAQs: Stretch Seamless Collection

WUKA Stretch pants celebrate every body. One pair stretches to fit up to four sizes, adapting to your unique shape and even during bloating, so you always get a secure, comfortable fit and a more sustainable period.

How much period blood do Super Heavy Pants Hold?
NEW Stretch™ Period Pants For Super Heavy Flow absorb 60ml of blood - the equivalent of 12 regular tampons and 8 pads.
Will switching to WUKA save me money?
Yes! Switching to WUKA is definitely a cheaper alternative to monthly usage of pads and tampons. WUKA period pants were the first in the world to completely replace pads and tampons- meaning even on your heaviest flow day you can be worry-free with zero leaks and odours thanks to our fast absorbing, quick drying underwear.
Are these period pants suitable for people with fibroids, PCOS, endometriosis or adenomyosis?
Yes, in fact these underwear were designed with you in mind. We understand how debilitating these conditions are and how super heavy flow requires additional protection. These pants will hopefully provide you with additional comfort and confidence on the heaviest days.
I've just had a baby, can I wear WUKA Stretch period pants?
Perfect for new mothers, WUKA Stretch was designed for you- super soft, comfy and designed to adjust to your body as it changes post pregnancy. The seamless design is gentle and sensitive to skin.
What is Stretch Technology?
In true taboo-breaking WUKA style, Stretch™ features our new patented Stretch™ technology— a meticulously designed suspended gusset is built in to each pair of underwear, engineered to retain its stretch, expand or contract depending on your unique shape. Figure flattering with a completely seamless construction, you’ll find no VPL’s here.
What Gusset Style are Stretch™?
All stretch™ period underwear come with a mid-height gusset
What is CoolMax Technology?
CoolMax™ Absorbent Technology fabric is used features in the top two layers gusset offering faster absorption for less chance of leaks and odours as well as faster-drying time post washing.
How do I care for my WUKA period pants?
Please wash these pants before wearing for the first time. Our WUKA Stretch period pants require a cold wash only. If your machine doesn’t have this setting, hand washing is your best alternative. We recommend treating your period pants as delicates. Using our mesh laundry bag will help to protect the fabric and prolong the life of your underwear.
How do WUKA period pants work?
Layers. Our many layers contribute to making sure you get a long lasting feeling of dryness and security, not having to worry about leakage, smell or infection. Every pair includes a super absorbent gusset which consists of many layers, the middle layers absorb and lock in the blood whilst working with the outer layer to ensure you stay dry through your day to day activities! Period pants look and feel like your regular underwear but they are leak-proof, which means you don't have to wear a pad, a tampon or menstrual cup when you wear them during your period.
I have really heavy periods, will I need to use any additional products?
It depends on the level of absorbency that you need. WUKA are designed to hold a certain amount of menstrual flow, as specified on our website from light flow to super heavy flow. If you have a very heavy flow, it's always best to carry extra pants.
How many pairs do I need?
We find that 5-7 pairs is best for most customers considering they last up to 2 years. Check out our savings on bundle cycle sets for 3 to 5 pairs.
How long will my period pants last for?
WUKA period pants can be reused for up to 2 years. For the first 40 days after you receive an order we offer a 100% satisfaction guarantee on your first pair of WUKA pants.
Do WUKA pants contain PFA's?
The simple answer is no! WUKA has been committed since day one to not use any harmful chemicals in the production of our products. All of the materials that we use are planet friendly, animal friendly and contain no added chemicals, such as silver or antibacterial treatments, stain-resistant or Perfluoroalkyl and Polyfluoroalkyl substances (PFAs or PFSAs). All WUKA are independently tested by Highstreet Textile Testing Services Ltd (HTTS) who guarantee there is zero trace of PFA's in our products.
How do I wash and dry my period pants?
After use, rinse with cold water until the water runs clear. This is best done immediately after removing. Pop your WUKA with similar, dark coloured garments and wash at 30-40ºc, inside out. Don't use fabric conditioners. Air dry your WUKA Period Pants outside on the line or indoors on an airer. Don't tumble dry it. For the Heavy Flow and the Super Heavy Flow, we advise washing inside out and giving them an extra spin. As well as this, we recommend sticking on a warm radiator to ensure complete dryness. We always advise washing pants as cold as possible. This will prolong the lifespan of your pants and also keep the absorbency as high as possible. Refrain from drying in a dryer or on a radiator (if possible) and always dry inside out. We would not suggest leaving your WUKA pants to soak for a prolonged time, this can cause the material and bonding to wear and damage quicker.
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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  • 5 stars: 270 (83%)
  • 4 stars: 33 (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.
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.

r
ruth d.
Wedding day saviours!

Wedding day saviours! I was on my period for my wedding with a sheath wedding dress. Two pairs of these saved me from any period-white dress stress. True to name, they were seamless beneath my dress and were super comfortable, no award digging in, rolling down or sausaging! 10/10 would recommend.

L
Lindsey B.
Fantastic product .

My daughter is going through peri menopause , I’m sure you know what that means , these heavy weight period pants have really helped her feel secure and confident whilst at work . The multi size worked well . Great product.

M
Myriam B.
Really well designed and effective

Very impressed with the design and effectiveness. First time I've tried period pants, was reluctant but my research said this brand would fit my needs. Comfortable and keep me dry for a whole day even on my heaviest day. Just change into a new pair at night. Really easy, better at night than a pad that slips around. Can go hiking in these with no worries. Easy to pop in the wash with a normal load of washing.

H
Harriet
So impressed!

I bought size 2 based off reviews and size guide. When I tried them on, my first thought was they felt a little loose and too comfy to be effective. I then happened to have a very busy day and a very heavy period, and they were absolutely amazing. They held up, were unbelievably comfortable and very secure - could not be happier with my purchase and will definitely be buying more!

C
Corinna B.
My Daughter has been using WUKA period pants for

My Daughter has been using WUKA period pants for the past few years now having to replace a few pairs,
Great stretch comfort and reliability highly recommend

L
Lisa C.
Brilliant productHave ordered

Brilliant product
Have ordered more!

A
Anonymous
Very well made and very

Very well made and very comfortable

A
Anonymous
Really comfortable and no panty lines

Really comfortable and no panty lines. Super absorbent too

A
Anonymous
Life changing

Wuka period pants are truly life changing, I am completely converted now! The sizing is great and they are so comfortable. I had no leaks on any day of my period and never felt uncomfortable, I will never be going back to pads or tampons again!

C
Claire
Best period pants ever! Super comfy and love the

Best period pants ever! Super comfy and love the stretch fit. I never have to worry about leakage or being uncomfortable again. I will never go back to pads - ever!

J
Jessica
Really happy with the price

Really happy with the price. I’ve been avoiding the thong style for years because I thought it would be too bulky but they’re actually pleasantly comfy and fit well (I’m a uk size 8-10)
Only wore them on my light days but they worked well with no leakage. Have washed them a couple of times and they’re still as good as new

H
Higia L.
I grew up in Guinea-Bisssau using folded cotton

I grew up in Guine-Bisssau using folded cotton cloth because disposable pads weren't always affordable or accessible. Years later, discovering reusable period underwear feels like returning to that resourcefulness but with modern confort and reliability.
These are comfortable, secure and thoughfully designed. While they are a premium product, the quality makes them a worthwhile investment for those who can access them. I am genuinely impressed and i would recommend them to friends and family looking for sustainable alternative.

E
Emily
Finally Made the Switch And I’m So Glad I Did!

I recently made the switch to WUKA period underwear, and I honestly wish I’d done it sooner. I’ve been so happy with them.They’re incredibly absorbent, even on heavier days and I haven’t experienced any leaks during my period, which was my biggest concern before switching.

They feel secure and reliable without being bulky or uncomfortable. I also love how soft and comfortable they are. They fit well, stay in place, and feel just like regular underwear. Knowing I don’t have to constantly worry about changing products throughout the day has made my period so much easier to manage.

Overall, switching to WUKA has been a game changer for me. I’d definitely recommend them to anyone thinking about trying period underwear.

K
Kayla B.
Super comfortable, no leaks

The underwear are super comfortable with good elastic and padding that you don't even notice until you need to change. I had no leaks although did need to change slightly more frequently than every 12 hours on my heavy days. I only wish they lasted longer than two years, I'm satisfied with everything else.