Essential Brief - Moderate Flow
Essential Brief - Moderate Flow
Essential Brief - Moderate Flow
Essential Brief - Moderate Flow
Essential Brief - Moderate Flow
Essential Brief - Moderate Flow
Essential Brief - Moderate Flow

Essential Brief - Moderate Flow

Regular price £17.95
Tax included. Shipping calculated at checkout.

FLUX Essentials™ 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 3 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 Hipster 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 3 Tampons' Worth / 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% 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 a girl in need. Find out more about our #ByYouForHer giving back scheme here

Please note: ALL sizes in Black are SOLD OUT and available on pre-order for shipping 25-July
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

Customer Reviews

Based on 15 reviews
Lauren (Leicester, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!
Best ever!

As soon as I tired these I was back on the website ordering more. I prefer these so much more than pads and tampons, never had any leaks I’ve had two periods now trying them out. They fit so perfect and you don’t get hot and sweaty in them like you do with a pad, it’s great just not having any rubbish from pads and tampons too. So easy to rinse and then wash. The quality of the product is amazing. I’m actually converted forever! Thank you flux! Also I did try these from seeing Stephanie toms on YouTube talk about them

Virginia (Garbagnate Milanese, IT)
Flow: Moderate, Light
Products used: FLUX Undies, obvs!, Menstrual cup
Life changing

They fit perfectly, they're comfy and I can wear them all day without having any leak problems. These pair really make you feel safe and I strongly recommend them!
I've even found them easy to wash.

Anonymous (Edinburgh, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!

Super comfy, no leaks and easy to wash.

Samantha Followell (Northampton, GB)
Flow: Super Heavy
Products used: FLUX Undies, obvs!
Just get them!

Honestly, if you’re on the fence about period knickers, then get off and get to the side where they are worn! I’ve never known a comfort like it. I hated pads, I didn’t want to stick wads of cotton up there and I wasn’t really okay with catching it all in a cup to empty out.

Nay nay. *vomits*

These knickers (pants/underwear/whatever) are an absolute game changer! I put them on and forget about my period (bar the crippling pain that feels like I’m being stabbed relentlessly in the womb by an angry toddler with a fork) and can go about my day literally not worrying. At all.

I have white sheets as well and I don’t have to worry.

To lay it all out there, I’m a heavy bleeder. Shark week is tough one for me and I was forever changing pads cause I’d have one outward flow and that would be it! BUT NO MORE!!

I was a bit “eurgh” about having to rinse the knickers out before I put them in the wash but do you know what? It’s MY blood. It came out of me. If I’d bled on a shirt I’d rinse that out so I try to look at it the same way (and I know it’s different blood - I’m just trying to be positive about it)!

I know this is a long old review but honestly, since I’ve had them, I’ve felt so much better about Satan’s Sacrificial Waterfall than I did before. Just being on my period is *easier*.

Genuinely, if you’ve been considering it, get a pair and watch your life change. I’ve recommended them to every person I know who sheds their uterine lining monthly, and I tell every person I meet about them (I do - I have *no* shame).

If there’s one thing we can do to make the worst part of our collective lives easier, then please, take my long ass advice and buy some. Enjoy the freedom of comfort and safety, even when sleeping!

Thank you FluxUndies. You’ve done me a world of good!!

Big love to my bleeders xx

Anonymous (London, GB)
Flow: Super Heavy
Products used: FLUX Undies, obvs!, Disposable pads
I am switching brands to Flux

Flux is the third brand of period underwear I have purchased. I weigh up following factors for purchases 1)cost 2)performance 3)fabric 4)ease of washing 5)fit. Flux has been the ONLY brand so far to meet all the above needs. I have had issues with other brands that had not fit well,changed shape after washing, did not wash well after multiple washes and therefore caused odour once dry, fell apart on gusset etc. Flux so far has not done any of aforementioned. I am setting aside cash to replace the other brands with Flux. The price is reasonable, I can wash at 40°, they don't change shape, they remain absorbent & they have not fallen apart yet. See pic of Flux vs other brands

Gemma Wallis (Lincoln, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!, Disposable pads
Just super!

I spent a long time readong reviews for other brands and went with Flux. One reason was the great reviews but the price.
I ordered just one pair and love them! They are comfortable, cooling, quiet (no rustling). I honestly thought I would feel like I was leaking all the time but the fit is so great that you feel so secure! Every time I went to the loo, I would see if there was any residue when tissue pressed but nothing!!!

I cannot recommend these enough! These knicker invention is so well overdue!

Even if you buy just one pair and wear for one day of your period, just have saved so many sanitary products going to landfill!!