Hi-Waist

£28.95
Hi-Waist - Heavy Absorbency

Wear on heavy days

HOLDS 4 TAMPONS' WORTH

  • Wear for up to 12 hours on heavier days
  • Holds four tampons' worth or 20-25ml
  • For periods, leaks & incontinence 
  • Great for day and night.
  • OEKO-Tex certified materials

Buy more + save more.

Hi-Waist

For heavy days

holds 4 tampons' worth / 20-25ml

£28.95

  • Wear for up to 12 hours on heavier days
  • Holds four tampons' worth or 20/25ml
  • For periods, leaks & incontinence 
  • Great for day and night.
  • OEKO-Tex certified materials

Buy more + save more.

Style + fit

Made with soft 'n' sustainable modal fabric on the inside, smooth nylon outside, and chic mesh panels for added style.

The super absorbent gusset means they feel like normal undies, but keep you fresh 'n' dry all day.

Fabric + care

Inner: 95% TENCEL Modal 5% Elastane, 

Outer: 92% Nylon 8% Lycra, 

Trim and sides: 100% Polyester, 

Gusset: Absorbent blend, Breathable PUL


Care: Quick rinse 🚿 40 degree wash 👌🏽 Hang to dry ✌🏿 No bleach or fabric softener ⚠️

Sustainably sourced

Fast + free UK shipping

Ethically manufactured

We give to girls in need

Customer Reviews

Based on 76 reviews
78%
(59)
16%
(12)
7%
(5)
0%
(0)
0%
(0)
P
P.
Flow: Moderate
Products used: FLUX Undies, obvs!, Menstrual cup
Great product, sizing is off

Great product, small in size.
I ordered 2 products from FLUX, both in XS and I'd say this one was more like XXS, while other was more like M.

It is nicely made, beautiful design and does not leak (at least it didn't for me).

A
A.D.T.
Flow: Heavy
Products used: FLUX Undies, obvs!, Disposable pads
New user

I tried for the first time and I enjoyed! Excellent for the personal confort and for the environement!

A
A.
Flow: Moderate
Products used: FLUX Undies, obvs!
Fantastic pants

This was my second order, but different pants this time now they have high waist. These pants are a game changer - so wish I had had these when I was a teenager to wear to school! On some heavier days I do an extra change around lunchtime. But I have never had any leaks.
The only difficulty with these is they do take a long time to dry. It is actually easier to dry these in winter when they can be put on the radiator. One of the other brands I also use to dry quicker - but I must say they are not as good. So be warned - you do do need a good number of pants. ‘Budget’ for at least two a day!

N
N.
Flow: Super Heavy
Products used: FLUX Undies, obvs!, Tampons
Great back up but needs some improvement

I've waited a few months to write a review so I can give a realistic opinion.
For the day time, these are great for my horribly heavy periods. However I was a bit disappointed because I chose them thinking they offered high front and back protection, which was what I needed for night-time protection, but the actual absorbent area doesn't extend far enough up the front - it's actually a bit shorter than the night time pads I used to wear. I bought some cheapy period pants elsewhere which offer coverage all the way up the front which I use instead (or add well as) at night so I don't strain the bedsheet.
As recommended, I ordered a size up but, even still, they're a bit snug around the leg - they are definitely comfortable elsewhere and generally well made but I've noticed some of the stitching starting to fray slightly on the mesh area so not sure how long they'll last.
All in all, they're fine but I won't buy any more because they don't really do what I need them to.

  • 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.

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.