Classic Bikini - Light Flow
Classic Bikini - Light Flow
Classic Bikini - Light Flow
Classic Bikini - Light Flow
Classic Bikini - Light Flow
Classic Bikini - Light Flow

Classic Bikini - Light Flow

Regular price £24.95
Tax included. Shipping calculated at checkout.

Our Classic Bikini period underwear in Light Flow combines style with function. Holding up to two tampons' worth, they are a dream to wear day and night and can be worn leak-free for up to 8 hours. 

  • For Periods, Leaks and Incontinence
  • Holds Two Tampons' Worth / 10-15ml
  • Wear For Up To 8 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: 95% TENCEL Modal 5% Elastane, 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 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. 
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

You may also like...

Why not try some of our best-sellers?

Customer Reviews

Based on 29 reviews
Jessica (Iesi, IT)
Flow: Light
Products used: FLUX Undies, obvs!

Super comfy!

Flow: Heavy
Products used: FLUX Undies, obvs!, Menstrual cup
Super comfy

My favourite pair of period underwear, I use alongside a cup as feels like normal underwear but gives me zero waste but fully protected and easy period.

E.G. (Sao Joao das Lampas, PT)
Flow: Moderate
Products used: FLUX Undies, obvs!, Cloth pads, Menstrual cup
Second pair of Flux Undies

This is my second pair overall, but first in this style
I personally prefer the Hi-Waist, as I feel they are better made than this pair
Period underwear is just the best, I feel like I'm on a "regular day" when wearing them

Lauren H. (Orpington, GB)
Flow: Light
Products used: FLUX Undies, obvs!
Prefer them to my normal pants!

These are so comfortable and work exactly as they should. I initially bought one pair as a trial but will be buying at least one more pair. They give you coverage but don’t cut in at all. I’ma 10/12 and bought medium

Ally (Pontypridd, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Cloth pads
Adding to the collection

Great for lighter days.
Comfortable, easy to clean, absorbed well even on my heavier days.

Ruth Poar (Liverpool, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!
Awesome pants!

These are so comfy I actually look forward to my period now! No leaks and tick all the eco boxes, love them (my 4th pair!!!)