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Medium
MEDIUM
FLOW
Model wearing WUKA navy blue period racerback swimsuit for medium flow, front full-length view.
  • Medium
    MEDIUM
    FLOW
    Model wearing WUKA navy blue period racerback swimsuit for medium flow, front full-length view.
  • Medium
    MEDIUM
    FLOW
    Close-up of WUKA navy period racerback swimsuit showing seamless front design for discreet period protection.
  • Free Shipping · 100% Happy Guarantee · Try for 40 days (free refunds)
  • Back view of WUKA navy racerback period swimsuit showing open back cut and racerback straps, designed for leak-free confidence.
  • Profile side view of WUKA navy racerback period-proof swimsuit for women, showcasing high-leg and secure fit.
  • Close-up detail of the soft, stretchable fabric used in WUKA navy period swimsuit, designed for comfort and leak protection.
  • Woman wearing WUKA navy racerback period swimsuit relaxing in a pool, demonstrating activewear function during swimming.
  • Water being poured on inner gusset of WUKA period swimsuit, highlighting its water-repellent and leak-proof technology.
  • Informational graphic highlighting features of WUKA navy racerback period swimwear: leak-proof up to 12 hours, UV50+ protection, chlorine resistance, and water-locking technology.
  • Model wearing WUKA navy blue period racerback swimsuit for medium flow, front full-length view.
  • Close-up of WUKA navy period racerback swimsuit showing seamless front design for discreet period protection.
  • Back view of WUKA navy racerback period swimsuit showing open back cut and racerback straps, designed for leak-free confidence.
  • Profile side view of WUKA navy racerback period-proof swimsuit for women, showcasing high-leg and secure fit.
  • Close-up detail of the soft, stretchable fabric used in WUKA navy period swimsuit, designed for comfort and leak protection.
  • Woman wearing WUKA navy racerback period swimsuit relaxing in a pool, demonstrating activewear function during swimming.
  • Water being poured on inner gusset of WUKA period swimsuit, highlighting its water-repellent and leak-proof technology.
  • Informational graphic highlighting features of WUKA navy racerback period swimwear: leak-proof up to 12 hours, UV50+ protection, chlorine resistance, and water-locking technology.
WUKA Period Racerback Swimsuit - Navy
Period SwimwearRacerback Swimsuit
£50.00 £34.99 Saving 30%
4.5

Size Chart

 

SWIM SIZE GUIDE

 

SWIMSUIT 

SIZE UK BUST  WAIST HIPS
XXS 6 70-75 55-60 80-85
XS 6-8 75-80 60-65 85-90
S 8-10 80-85 65-70 90-95
M 10-12 85-90 70-75 95-100
L 12-14 90-95 75-80 100-105
XL 14-16 95-100 80-85 105-110
2XL 16-18 100-105 85-90 110-120

 

 

SWIM BRIEF

SIZE UK EU USA
XXS 4-6 30-32 0-1
XS 6-8 32-34 1-2
S 8-10 34-36 2-4 
M 10-12 38-40 6-8
L 12-14 42-44 10-12
XL 14-16 44-46 12-14
2XL 16-18 46-48 14-16
3XL 18-20 48-50 16-18
4XL 20-22 50-52 18-20
5XL 22-24 52-54 20-22
6XL 24-26 54-56 22-24

 

SWIM TOPS

CUPS
Band A B C D DD E F
28 No No No
30 XS XS XS XS S
32 XS S S S S
34 XS S S M M M
36 S M M M L L
38 M L L L XL XL
40 L XL XL XL XXL
42 XXL XXL XXL

 

How to Measure Your Hip Size

Period swimwear size chart showing how to measure chest, underbust, waist, hips, and leg opening to find the perfect WUKA fit. Get the right size first time for leakproof, comfortable, and secure menstrual swimwear.

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.
Size
Recycled Nylon
Recycled Nylon
UV Resistant
UV Resistant
Leakproof & Breathable
Leakproof & Breathable
Anti-Chlorine
Anti-Chlorine

WHY YOU’LL LOVE IT
Bold meets beautiful - with built - in leak protection so you can swim, splash, and relax effortlessly. This Oxford Blue swimsuit keeps you stylish and secure, all cycle long.

HOW IT WORKS
Featuring a waterproof outer shell, absorbent core, and soft lining, it holds up to 15 ml of menstrual flow - about 3 tampons or 2 pads - for light to medium days. The sculpted racerback cut moves with you while hiding protection, not your confidence.

BEST FOR
Pool workouts, beach days, paddleboarding, or light bladder leaks - perfect for anyone wanting swimwear you can trust while on your period.

GOOD TO KNOW
Wash before first wear. Made from chlorine resistant recycled nylon, breathable, fast drying, UV‑50+, and PFAs - tested. Each swimsuit replaces roughly 200 disposable pads or tampons over its lifetime.
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 : 61% recycled nylon, 39% elastane Middle: 80% polyester,20% elastane Breathable TPU
Inner:50%bamboo charcoal,50%polyester

FAQ: Leak-Proof Period Swimwear

WUKA period swimwear is designed to absorb periods and little leaks whilst in or out of the water.

How does waterproof swimwear actually work?
WUKA swimwear features a built in absorbent gusset made of three unique layers. The breathable top layer is designed to feel soft and comfortable to the touch as it sits closest to to your skin. The second layer is highly-absorbent and moisture wicking, helping to absorb up to 3 tampons worth of blood. Lastly the final or outer fabric is aquaphobic meaning it is water repellent which prevents water from entering the gusset and protects against leaks. While it is safe to swim in period swimwear on your periods, we suggest using a menstrual cup or other products as backup on your heavy flow days.
Can I wear them on heavy flow days?
WUKA period swimwear is recommended for use on light to medium flow days. If you are using them to swim for long periods of time, they are best for lighter days. If however, you’re spending the day lounging by the pool with only the occasional light swim then they can also be worn on medium flow days. We do not recommend them for heavy flow days.
Can I wear the swim briefs whilst using other products?
Yes of course! For added protection on heavier flow days, we recommend wearing the swimsuit alongside a menstrual cup, disc or tampon- the more sustainable and plastic free the better!
What Material is your swimsuit made of?
As a certified B Corp that places sustainability at the heart of our brand mission, our WUKA swimwear collection is made from recycled nylon so no virgin plastic are used to make the fabric. Remember each WUKA replaces 200 disposables going to landfill.
What does UV50 protection mean?
Also known as Ultraviolet Protection Factor (UPF), UV protection indicates how much UV radiation (both UVB and UVA) a fabric allows to reach your skin. For example, our swimwear collection is made using UV50+ protection fabric which blocks 98% of the sun's rays and allows 2% (1/50th) to penetrate, thus reducing your exposure risk to harmful rays significantly.
How do I wash them?
Rinse them in cold water before washing to remove any excess blood. Wash them in the washing machine on a delicate program at 30°C maximum. Do not use any fabric softener or detergents. Air dry and never use a tumble dryer!
What styles are the swim briefs available in?
Two styles. The high waist style is available for adults whilst the classic bikini brief is available for adults and teens.
What sizes are the swim briefs available in?
Adult Sizes range from XS- 4XL in both the bikini and high waist swim briefs. Teens Swim Bikini Briefs are available in sizes 2XS - L.
How do I know what size of Teen Swim Bikini to buy for my child?
2XS:4-6, XS:6-8, S:8-10, M:10-12. These are just for recommendation. We know all kids grow at different rates, so the best way to get the right size is measure the widest part at the hip and see our size chart to get the right size. You can always ask our customer support if you need help. Anther way to get the size right is by matching with high-street brands, if your teen wears size 4-6 opt for 2XS, if they wear 6-8 go for size XS, If they wear 8-10, go for small size.
Can I wear WUKA swim even when I am not on my period?
Your WUKA is one period swim collection is perfect for wearing in the water- whether it's by the pool, the beach or under a wetsuit. Whether you are on you period or not, they are great to use. The leakproof gusset is built into all of our period swimwear to be discreet and undetectable, so they look and feel just like regular swimwear.
Can I return my period swimwear?
Yes! All of our swim bottoms and one-pieces are eligible for a return or exchange within 30 days of delivery, as long as the original sanitary strip and tags are attached.
Is the swimwear chlorine-safe?
Yes. Our period swimwear is seawater and chlorine-resistant which helps to prevent fading and keeps your swimwear long-lasting.
I am scared that I might leak in the pool
If you have a fear of using WUKA in the pool, we suggest you use them only on your light flow day, till you gain confidence.

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Customer Reviews

Based on 4 reviews
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M
Matilda
Really rate WUKA products including swimwear

Haven't used it yet, but I've got other WUKA swimsuits and always been really pleased - been able to trust that they'll have my back when needed! Fit of this costume is great and love the colour.

A
Anonymous
This was for my daughter and she said fit wasn’t

This was for my daughter and she said fit wasn’t great as she is larger in the chest but gave just enough coverage and better than the other one we ordered at same time which gave little coverage over the chest area

A
Anonymous
Saved the family holiday!

My friend recommended the swimwear. I have to admit I was very sceptical and didn’t have much faith in a swimming costume not leaking in a pool and it being an embarrassing experience for my daughter. My daughter started her period on the way to the airport, she was upset, and immediately thought that was it for any pool time. Luckily I’d packed the costume. She used the swimming costume every day and it was an absolute god send! She spent hours in the pool and had no leaks. We hand washed it every night and it was dry by the next day. A pricey swimming costume but worth every penny! Thank Wuka!

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