Bikini

£24.95
Bikini - Light Absorbency

Light to Moderate absorbency

holds 2 tampons' worth

  • Wear for  8 hours on lighter days
  • Holds two tampons' worth or 15ml
  • For periods, leaks & incontinence 
  • Great for day and night.
  • OEKO-Tex certified materials

Buy more + save more.

Bikini

Wear on Light to Moderate days

holds 2 tampons' worth / 15ml

£24.95

  • Wear for  8 hours on lighter days
  • Holds two tampons' worth or 15ml
  • For periods, leaks & incontinence 
  • Great for day and night.
  • OEKO-Tex certified materials

Buy more + save more.

Style + fit

Wear on lighter to moderate days, for up to 8 hours.


Made from super soft eco-friendly TENCEL modal fabric and featuring a soft and stretchy lace waistband. 


The super thin gusset means they feel like normal undies but keep you fresh and dry all day.

Fabric + care

Inner: 95% Modal 5% Elastane, 

Outer: 95% Modal 5% Elastane, 

Trim: 100% Polyester, 

Gusset: Cotton, 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 17 reviews
88%
(15)
6%
(1)
6%
(1)
0%
(0)
0%
(0)
S
S.
Flow: Light
Products used: FLUX Undies, obvs!
Great pants

Amazing pants, I could hardly believe I wasn’t wearing normal pants! And they worked so well, I wore them all day on my heaviest day, felt completely dry, wore my tight jeans for the first time on my period and went out dancing! Amazing!

K
K.J.
Flow: Moderate
Products used: FLUX Undies, obvs!, Disposable pads
Perfect for light flow days

These work great for light flows days

S
S.
Flow: Heavy, Moderate
Products used: FLUX Undies, obvs!
Amazing

I’ve completely scrapped any other kind of sanitary product now and just rotate 4 pairs of these. Massive life changer. No expenditure on pads or tampons anymore and full comfort and trust in this underwear - I can put them on and go about my day without even considering my period. No feeling messy or uncomfortable. Cannot rave about them enough. The fit is excellent and the lace trim makes you still feel cute.

P
P.
Flow: Heavy
Products used: FLUX Undies, obvs!, Menstrual cup
Love them!

I love them, they made my periods better. I feel more relaxed, confident and safe. No worries at all!

  • 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.