Essential Brief - Heavy Flow
Essential Brief - Heavy Flow
Essential Brief - Heavy Flow
Essential Brief - Heavy Flow

Essential Brief - Heavy Flow

Regular price £19.95
Tax included. Shipping calculated at checkout.

FLUX Essentials™ Heavy Flow period pants look and feel like regular underwear but have the power to absorb your period and prevent leaks. This comfortable cotton underwear is quick-drying and super soft, bringing you next level comfort. 

The all-new FLUX Essentials™ line of period pants brings you comfortable cotton underwear with our signature built-in tech that absorbs up to 4 tampons' worth.

This new range uses excess left-over fabric which allows us to bring you a more affordable product whilst using fabric that would have otherwise gone to waste. One Essential Brief replaces at least 200 single-use disposables, making it a sustainable win-win.

Our mission is to help as many people as possible make the switch to sustainable period care, and our new Essential range makes our undies even more accessible to those wanting to make the switch.   

  • For Periods, Leaks and Incontinence
  • Holds 4 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% Cotton 5% Elastane Gusset: 100% Cotton, 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 8 reviews
Florentina Parvu-Mateescu (Wanstead, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!
Nice cotton undies

They do what they are meant to. Really thankful for this. They are really great compared to a disposable pad!
But as in every product there is a "but". The side sewing is quite rough which make it hurt a bit. It feels way better than a standard disposable pad but the side sewing is nowhere near ideal. Sorry but my thigh is not of steel ( :) )and I can feel the knots and sewing.
If you ask if I would go back to disposable pads...certainly not! But some work needs to be done to make them more comfortable.

Thank you very much.

Maria R (Frankfurt am Main, DE)
Flow: Moderate
Products used: FLUX Undies, obvs!, Menstrual cup

I didn't love the shape/look of the pants when they arrived, but once I tried them on they felt very comfortable. Compared to other menstrual undies I own, these are more comfortable and I have the feeling the material is lighter and breathable. They don't feel as hot as others. Easily washable, no stains and no bad odor.
During the day I do not dare to wear menstrual pants alone, I always use them together with a menstrual cup. I use nothing but the Flux pants at night or on the last few days when the flow is lighter. So far I haven't had any leakage problems.
One important thing if you are buying from outside the UK: I had to pay customs taxes to pick them up at the post office. After paying that, the total cost is not so attractive compared to other brands.

Alice R. (Newtownabbey, GB)
Flow: Super Heavy
Products used: FLUX Undies, obvs!, Disposable pads
Pretty good

Quite good but I have quite a heavy flow and the pants didn’t leak as such but you could tell that the blood was starting to come through the bottom, although this was probably my fault as I’d been wearing them longer the recommended time. Also, the pants have been stained an orange-red colour. Aside from these minor issues the pants were good, comfortable and I didn’t have to worry about leaking all day, also there was no smell, so I will continue to use them.

R. (Basingstoke, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!, Tampons, Disposable pads
Pretty decebt

They’re pretty good for the price. They’re pretty thick though and I guess they have a sort of… boxer short vibe to them? They work pretty well but I used them mostly at night… during the day I would be too nervous (and how to change my pants during work!?)

Sharan C (Camberwell, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons
No leak, no worry

These have been just what I needed. They provide enough protection through the night & I no longer worry about leaks.

Polina Pozarova (Leeds, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Disposable pads
work great!

these are very good especially at night! ⟟ feel like leaking has definitely stopped when i’m asleep so ⟟ definitely reccomend