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MEDIUM
FLOW
Adult period racerback swimsuit in black for medium flow – full-length front view showcasing sleek design and comfortable fit
  • Medium
    MEDIUM
    FLOW
    Adult period racerback swimsuit in black for medium flow – full-length front view showcasing sleek design and comfortable fit
  • Medium
    MEDIUM
    FLOW
    Close-up of WUKA black racerback period swimsuit – front view highlighting smooth, minimalist design for leak-proof protection during medium flow
  • Free Shipping · 100% Happy Guarantee · Try for 40 days (free refunds)
  • Back view of black period racerback swimsuit with keyhole cutout – secure and stylish swimwear for menstruation support
  • Side profile of black racerback period swimsuit – form-fitting menstrual swimwear designed for confidence in water
  • Detailed close-up of racerback period swimsuit material – showing soft, stretchable fabric designed for discreet protection and movement
  • Model relaxing in pool wearing WUKA black period swimsuit – stylish and leak-proof swimwear for medium menstrual flow
  • Water being poured onto absorbent gusset of period swimsuit – demonstrating waterproof, leak-proof menstrual technology for secure swimming
  • Infographic highlighting key features of period racerback swimsuit – locks periods in, keeps water out, 12-hour leak protection, UV50+ and chlorine resistance
  • Adult period racerback swimsuit in black for medium flow – full-length front view showcasing sleek design and comfortable fit
  • Close-up of WUKA black racerback period swimsuit – front view highlighting smooth, minimalist design for leak-proof protection during medium flow
  • Back view of black period racerback swimsuit with keyhole cutout – secure and stylish swimwear for menstruation support
  • Side profile of black racerback period swimsuit – form-fitting menstrual swimwear designed for confidence in water
  • Detailed close-up of racerback period swimsuit material – showing soft, stretchable fabric designed for discreet protection and movement
  • Model relaxing in pool wearing WUKA black period swimsuit – stylish and leak-proof swimwear for medium menstrual flow
  • Water being poured onto absorbent gusset of period swimsuit – demonstrating waterproof, leak-proof menstrual technology for secure swimming
  • Infographic highlighting key features of period racerback swimsuit – locks periods in, keeps water out, 12-hour leak protection, UV50+ and chlorine resistance
WUKA Period Racerback Swimsuit - Black
Period SwimwearRacerback Swimsuit
€57,95
4.8

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
Leakproof & Breathable
Leakproof & Breathable
Anti-Chlorine
Anti-Chlorine
UV Resistant
UV Resistant

WHY YOU’LL LOVE IT

The WUKA Period Swimsuit is a sleek one-piece that looks and feels just like regular swimwear – but with hidden built-in protection. Designed for performance and style, it lets you swim, splash, and relax without pads or tampons, so you can hit the pool, beach, or spa with total confidence.

HOW IT WORKS

The ultra-absorbent gusset holds up to 15ml of flow – about 3 tampons’ worth or 2 pads – making it ideal for moderate periods or light bladder leaks. A waterproof outer, chlorine-resistant recycled nylon, and UV50+ protection keep the suit durable, quick-drying, and secure. Removable padded cups and a diamond-cut back add to the flattering fit.

BEST FOR

Swimming, water sports, holidays, or spa days. Perfect for moderate flow or as a backup with a menstrual cup or tampon. Built for performance in and out of the water.

GOOD TO KNOW

Made from eco-friendly recycled nylon with UV50+ and anti-chlorine protection. Wash before first wear. Each swimsuit is reusable for up to 2 years, replacing around 200 disposables and helping reduce waste.
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 27 reviews
81%
(22)
15%
(4)
4%
(1)
0%
(0)
0%
(0)
J
Julia E.
Doesn’t give sufficient coverage at the front

Good quality but unfortunately design leaves you exposed on the front. Never what you need, especially with a period.

A
Anne B.
Great swimsuit

I bought this for my daughter. I checked the sizing chart before buying and the swimsuit fits perfectly. She loves wearing it. No more missed swimming lessons!

L
Louise
Great swimsuit, but not for a larger bust.

The swimsuit is of the same quality that I’ve come to know well from Wuka. The concept is great. Sadly, it’s not made for ladies with a bigger bust even sizing up. If different styles came out I would definitely give them a go.

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