High Waist - Heavy Flow
High Waist - Heavy Flow
High Waist - Heavy Flow
High Waist - Heavy Flow
High Waist - Heavy Flow
High Waist - Heavy Flow
High Waist - Heavy Flow

High Waist - Heavy Flow

Regular price £28.95
Tax included. Shipping calculated at checkout.

Say hi to our period proof tummy-hugging Hi-Waist! These leak-proof High Waisted period panties promise to give keep you comfortable and supported during your period, perfect for those bloated days. 

Made with super soft and sustainable Micro-Modal fabric on the inside, silky smooth nylon outside, and chic mesh panels for added style. The super absorbent gusset means they feel like normal undies, but keep you fresh and dry, day and night.

  • 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% Nylon 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 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

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Customer Reviews

Based on 89 reviews
Kendra S (Grant, US)
Flow: Moderate
Products used: FLUX Undies, obvs!

I love mine. They are the only things I have to wear. I got several pairs and they are the best.

Claire H (Gillingham, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons
Great buy

These were my first attempt at period pants and I was super happy with them. Used them on my heaviest flow day, without any additional help (tampon) and I was fine throughout the day, probably 6-7h straight. Now looking to find the equivalent for nightime as was let down by my other pair of Heavy Flow Flux undies....

EmmaJ (Nottingham, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Menstrual cup

Really comfortable and effective. Should have used these sooner

Parveen (Lee, GB)
Flow: Super Heavy
Products used: FLUX Undies, obvs!, Tampons, Disposable pads
I have just ordered a second pair my

I tried another brand when I ordered these. Ordered 5 to get the maximum discount too. They were awful in comparison to these. These pants were ready to use and stayed leak proof all day. Would highly recommend.

Nell Thackray (Pickering, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!
Yes! Buy them!

I bought a few pairs of these pants a couple of months ago and I love them! They are super comfy and easy to wash, and look great too! Not to mention the incredible difference they make to the environment! I would definitely recommend buying a size bigger than you normally wear as they do size quite small, and I find some pairs to be quite tight around the thigh. Also it's definitely worth getting several different pairs in a range of sizes to use on the lighter and heavier days. I really struggle with tampons and so have always worn pads -these pants make everything feel so much more neat and tidy on my period. Highly recommend!

Lisa Duguay (Buxton, US)
Flow: Super Heavy
Products used: FLUX Undies, obvs!
I live these

I have a really.heavey flow and very painful these undies have been a life saver I have many pairs they HD a lot I feel comfortable all day no leaks and super easy to care for. I love these undies!!!!