Classic Bikini - Heavy Flow
Bikini style lace period pants
Bikini style lace period pants
Bikini style lace period pants
Classic Bikini - Heavy Flow
Classic Bikini - Heavy Flow
Classic Bikini - Heavy Flow

Classic Bikini - Heavy Flow

Regular price €28,95
/
Tax included. Shipping calculated at checkout.

Our Classic best-selling Bikini period underwear combines style with function. Holding up to four tampons' worth, they are a dream to wear day and night and can be worn leak-free for up to 12 hours. 

  • For Periods, Leaks and Incontinence
  • Holds Four Tampons' Worth / 20-25ml
  • Wear For Up To 12 Hours Leak-Free
  • Soft, Stretchy and Comfortable
  • Lightweight and Quick-drying
  • OEKO-Tex Certified Materials
  • Free From Toxins, Chemicals and PFAS/PFOA

Materials: Body95% TENCEL Modal 5% Elastane Gusset: Absorbent Blend, Breathable PUL Packaging: 100% Recycled and Recyclable Cardboard

🍃 Bleed Green: Each pair of our period pants replace 200+ disposables from going to landfill, reducing your waste by 99.5%

🤝 Giving Back: For every purchase, we give back to someone in need. Find out more about our #ByYouForThem giving back scheme here

We offer free shipping on all UK orders and free tracked shipping on International orders over £75.
For same-day dispatch and next day delivery, please place your order before 1pm.
All orders are dispatched from our UK warehouse using trusted couriers such as Royal Mail, DHL and DPD. 
 

Delivery options

UK

DPD Next Day Delivery Service 

Next day service, shipped by DPD tracked, £6.95

Royal Mail 1st Class Delivery Service 

1-2 days, shipped by Royal Mail tracked, £4.95

FREE Standard Shipping Service 

2-3 days, shipped by Royal Mail untracked

 

EU

*Free standard shipping is offered on all EU orders above £75 

Express Tracked Shipping Service 

1-2 days, tracked and signed, £14.95

Tracked Shipping Service under £75

3-5 days, tracked, £9.95

FREE Tracked Shipping Service under £75

3-5 days, tracked

 

USA & Canada

*Free standard shipping is offered on all International orders above £75

Express Tracked Shipping Service 

1-3 days, tracked and signed, £19.95

Tracked Shipping Service for orders under £75

5-7 days, tracked, £11.95

FREE Tracked Shipping Service for orders over £75

5-7 days, tracked

 

Rest of world

*Free standard shipping is offered on all International orders above £75

Express Tracked Shipping Service 

1-4 days, tracked and signed, £19.95

Tracked Shipping Service for orders under £75

5-7 days, tracked, £14.95

FREE Tracked Shipping Service for orders over £75

5-7 days, tracked

Think our period pants sound too good to be true? Take them on a risk-free trial for 60 days!

If our undies don't work as promised, let us know within 60 days and we'll refund you, no questions asked. The 60-day risk free trial applies to one worn pair of undies only. Refunds will be paid to the original payment method that was used to place the order.
🚿 Rinse after use.
🧽 Machine wash on 30-40 degrees.
 🍃 Hang to dry or dry indoors on a radiator.
⚠️ Do not use fabric softener or bleach. No tumble drying.
And that's it! Your FLUX Undies are ready to wear again!

Our Period Pants Are:

Sustainably Manufactured

We only use eco-friendly materials that are sustainably manufactured

Vegan and Cruelty-Free

Made from natural materials and never with animal materials or testing

Free From Nasties

Certified safe for skin and free from toxins, chemicals and fragrances.

60-Day Money Back Guarantee
How They Work

Our period pants absorb up to 5 tampons' worth of liquid, yet they look and feel just like regular undies.

Our built-in tech works like this:

1. Top layer wicks moisture away from the surface quickly, to keep you dry

2. Our middle layers absorb your blood and lock in your flow

3. The bottom layer pushes liquid back up and keeps you leak-free

It's simple. Just wear, wash and reuse.

Blood, Sweat, Whatever.

Three layers of fabric absorbing liquid showing how period pants work

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Customer Reviews

Based on 177 reviews
85%
(150)
11%
(20)
4%
(7)
0%
(0)
0%
(0)
H
Hellen Cristea (Beckton, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Disposable pads

So comfortable and pretty. No leaks.

F
Felicity (Watford, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Disposable pads
Excellent

Absolutely loved wearing these - so comfy and I recommend. It takes a bit of getting used to not wondering if you’re leaking but I didn’t and felt good for half the day then I changed. If I had the money I’d only wear these on my period - have the medium flow as well and also love.

R
Rachel Fettiplace (Brighton, GB)
Flow: Light
Products used: Disposable pads
Wish I’d bought these years ago

Comfortable, pretty, so much more eco friendly!

N
Nikki Smith (Stockport, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons, Disposable pads
Super comfy

Never tried these before so was a little nervous but they worked fantastically. No leaks, felt really comfy on, wore for around 8 hours with a heavy period and have now purchased two others! Will definitely be recommending

K
Katie Reid
Flow: Heavy
Products used: FLUX Undies, obvs!
Game changer

These are honestly amazing. I have very heavy periods for my first few days and ordered the heavy flow pants. I wore them for 8 hours without any leaks. They are so comfy and I never want to go back to pads again.
Thank you for a great product.

J
JA (Manchester, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!, Tampons
So impressed!

I must say I was very sceptical but thought I’d give them a try. Wow what a game changer! I feel secure, dry, comfortable. Just bought 2 more pairs!