NEW!

Essential Brief

£17.95
Essential Brief - Moderate Flow

flow: moderate

holds 2-3 regular tampons' worth / 15ml

The all-new FLUX Essentials™ line of period pants brings you comfortable cotton underwear with our signature built-in tech that absorbs up to 2-3 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.   

  • Classic, comfortable cotton 
  • OEKO-Tex certified and BCI Cotton
  • Wear for up to 8 hours on a moderate flow
  • Holds 2-3 tampons' worth or 15ml
  • For periods, leaks & incontinence 
  • Protective layer from front to back

NEW!

Essential Brief

flow: moderate

holds 2-3 tampons' worth / 15ml

£17.95

The all-new FLUX Essentials™ line of period pants brings you comfortable cotton underwear with our signature built-in tech that absorbs up to 2-3 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.   

  • Classic, comfortable cotton 
  • OEKO-Tex certified and BCI Cotton
  • Wear for up to 8 hours on a moderate flow
  • Holds 2-3 tampons' worth or 15ml
  • For periods, leaks & incontinence 

Style + fit

Made with quick drying super-soft cotton, bringing you next level comfort. 

Protective layer goes all the way back for extra coverage, making them perfect for sleeping!

Fabric + care

body: 95% cotton 5% elastane 

gusset: 100% cotton, breathable PUL


care: quick rinse 🚿40 degree wash 👌🏽 hang to dry ✌🏿 no bleach or fabric softener ⚠️

Product details
  • Moderate absorbency - holds up to 2-3 tampons' worth for up to 8 hours 
  • Super-soft and breathable gusset, with our reliable leak-proof technology
  • Soft and comfortable cotton in a boxer short design
  • OEKO-Tex certified materials - safe for your skin

Sustainably sourced

Fast + free UK shipping

Ethically manufactured

We give to girls in need

Better for you. Better for the planet.

*comparison after 3 years use

Period Pants

Disposables


I use 4 pairs


I wash them after use


I spend £1.89 per cycle


I generate 0.2kg of waste

I use 500+ disposables


I throw them after use


I spend £3.33 per cycle


I generate 4.5kg of waste

*Compared to the average price of UK's leading brand of organic pads/tampons. Price checked 25/02/2021.

Customer Reviews

Based on 6 reviews
83%
(5)
17%
(1)
0%
(0)
0%
(0)
0%
(0)
B
B.B.
Flow: Super Heavy, Heavy
Products used: FLUX Undies, obvs!, Tampons, Menstrual cup
Unbelievably Superb

I absolutely bloody love these. I have tried countless types of period proof underwear, from all different brands and they were all hideously bulky and made me feel so gross each month. These ones from Flux have BLOWN ME AWAY. I have heavy periods and these pants are not at all bulky and haven't leaked at all. Plus these wash and dry so much more easily than other period pants because the vaginal-pad part isn't as thick as a winter fleece. If you are looking for actually nice fitting, non-bulky period pants, or have moderate to heavy periods, I cannot recommend these enough! I have been recommending these to every human I know. Looking forward to pay day when I can buy some more eeeek!

H
H.
Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons
Comfy

I bought these to try as an alternative to pads. I was so happy with the results. So much more comfortable, you barely know you are wearing the underwear. It was nice not to have to panic about running out of pads. The pants to take a while to dry which is understandable so I know I will need more but am happy with them as a sustainable period product. I see it as an investment as they can be used again so will certainly be buying more over time.

L
L.L.
Flow: Moderate
Products used: FLUX Undies, obvs!
Comfort and Serenity

The fright of not having enough pads is gone. The fright of unwelcomed stains is gone. I'm playing around with different models as my flow is pretty inconsistent. The pants are comfortable, cute-looking and they really do a great job.
I do [undeniably] need additional pairs to make sure I don't wear them out after too many washes - I currently own 5x and would like to have a few more :)

K
K.E.
Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons
Comfortable, reliable and environmentally friendly

I first bought a few pairs of Flux a couple of years back; I was conscious of the amount of waste produced from conventional sanitary pads and tampons. I now own enough Flux underwear to cover every day of my period and they do pay for themselves over time. I've never had any leaks and I'm very impressed with how the pants perform even on my heaviest days. Apart from anything else it's just good to know that I've always got a sanitary product if I need it.

  • How They Work
  • Money-Back Guarantee
  • Find Your Size
  • FAQ's

Moisture-wicking

Soft material wicks moisture and dries fast

Anti-microbial

Prevents bacteria building up and keeps smells away

Super absorbent

Absorbs liquid without feeling bulky or heavy

Leak-proof

Breathable layer prevents leaks and stains

Moisture-wicking

Soft material draws moisture away and dries fast

Anti-microbial

Prevents bacteria building up and keeps smells away

Super absorbent

Absorbs moisture and liquid without feeling heavy or bulky

Leak-proof

Breathable layer prevents leaks and stains all day

try our period-proof undies risk-free

if you're not period-ing better within 60 days, we'll give you your money back. no questions asked.

  • XXS
  • XS
  • S
  • M
  • L
  • XL
  • 2XL
  • 3XL
  • 4XL

size XXS

UK 4/6   US 0/2   EU 32/34

waist 60-63cm

hips 83-86cm

size XS

UK 8   US 6   EU 36

waist 64-67cm

hips 87-91cm

size S

UK 10   US 6   EU 38

waist 68-72cm

hips 92-96cm

size M

UK 12   US 8  EU 40

waist 73-76cm

hips 97-101cm

size L

UK 14   US 10   EU 42

waist 77-81cm

hips 102-106cm

size XL

UK 16/18   US 12/14   EU 44/46

waist 82-90cm

hips 108-116cm

size 2XL

UK 20/22   US 16/18   EU 48/50

waist 91-101cm

hips 117-127cm

size 3XL

UK 24/26   US 20/22   EU 52/54

waist 102-112cm

hips 128-138cm

size 4XL

UK 28/30   US 24/26   EU 54/56

waist 113-123cm

hips 139-149cm

what is your return policy?

We offer free returns and exchanges within 60 days of purchase, no questions asked! Just visit our Return & Exchange Centre to get started.

how long can i wear them?

If cared for properly, our undies are likely to have a maximum tech performance of approximately 3 years. This means washing them on a 30-40 degree wash with the rest of your delicates, never using bleach or fabric softener, and hang drying! In terms of length of wear, we measure our undies by absorbency with our highest absorbency styles holding 4 tampons worth of fluid. For some customers, that means wearing them the whole day and for others that may mean carrying an extra pair of FLUX Undies as a backup. 

how do they work?

FLUX Undies are underwear that absorbs your period. Every pair is made with technology that absorbs your flow, wicks moisture, controls odour, and prevents leaks — leaving you fresh and dry. Take a look at our How it Works page to learn more.

how do i find the right size?

We recommend following the hip measurement, as most of our styles sit on the hips. Be sure to measure your hips at their widest point to find the most accurate size for you! In case you don't have a tape measure, you can use the size you usually are most comfortable with for your underwear. We recommend the undies fit snuggly, but not so tight that it's uncomfortable. For reference, you can check out our size chart above.

A style to suit you

Meet our other styles

Boyshort

£27.95

flow: heavy

Hi-Waist

£28.95

flow: heavy

Classic Bikini

£27.95

flow: heavy