Boy Brief

£24.95
Boyshort - 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.

Boy Brief

Light to Moderate absorbency

holds 2 tampons' worth / 15ml

£24.95

  • Wear for up to 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

Comfort is at the very top of the list with our Boy Briefs. Featuring our classic elastic logo waistband, full of stretch and softness. 


The super thin gusset keeps them feeling like regular undies, whilst keeping you dry all day long.

Fabric + care

Inner and Outer: 95% Modal 5% Elastane

Waistband: 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 20 reviews
90%
(18)
5%
(1)
5%
(1)
0%
(0)
0%
(0)
F
F.
Flow: Light
Products used: FLUX Undies, obvs!
Too big

I ordered medium, as it said it was better to up-size, but the size was huuuge. I am normally size small. I do like the material and it seems comfy, so I am exchanging it for a size small, hoping it will fit better.

H
H.
Flow: Moderate
Products used: FLUX Undies, obvs!, Disposable pads
Great!

These feel like normal underwear , provide great coverage and will definitely be using these from now on.

J
J.
Flow: Moderate
Products used: FLUX Undies, obvs!, Tampons
So comfortable

I brought these light absorbency boy shorts for my lighter days.
I have 2 days of moderate/heavy flow, and then 3 days of light, where I would normally switch to pads/liners.
I have worn them and they are perfect; very comfortable and just look and feel like normal pants, actually I think they are better. No digging in. I brought my actual size.
Now I know how good they are, I will be buying some more for my first couple of days of my period.
These are worth every penny.

B
B.
Flow: Heavy
Products used: Menstrual cup
Comfy and cute

I use a Nixit cup which has changed my life but just for security I like to wear a liner but I find them irritable to my skin. These pants are so comfy, don’t feel thick at all, you wouldn’t know they are period pants! They also look so cute and I feel really good in them.

  • 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.