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