FLUX Boyshort

holds 4 tampons' worth

Comfort is at the very top of the list with our Boy Briefs.  

Featuring our classic elastic logo waistband, full of stretch and softness. Boy Brief rest at the perfect place so you can feel comfortable throughout your whole period. 

Boyshort holds 4 tampons' worth so you can feel covered no matter what your flo'. 

Boyshort - Heavy Absorbency


Holds 4 tampons' worth


Interior: 50% Modal 50% Organic Cotton, Exterior: 82% Nylon 18% Lycra, Trim: 100% Polyester

Please note: Beige Bikini is on pre-order and will be shipped within 1 week



Give 'em a quick rinse 🚿


Chuck 'em in a mesh laundry bag before popping them into the machine on a cold wash 👌🏽


Hang to dry outside or inside! ✌🏿

PS: Don't use bleach or fabric softener ⚠️

Customer Reviews

Based on 50 reviews
Flow: Heavy
Products used: FLUX Undies, obvs!
No nonsense periods

Excellent product, really surprised at how well these work and how comfortable they are!! Have been recommending them to lots of girlfriends

Flow: Heavy
Products used: FLUX Undies, obvs!, Cloth pads
So comfortable

I love these. They beat any other method by far. I find they run a tiny bit tight, but that's quite reassuring really! They handle my heavy flow with ease - massively alleviated my worries and saved my bedsheets!

Flow: Heavy
Products used: FLUX Undies, obvs!, Tampons
Excellent product

Couldn’t be happier with my purchase. Excellent quality, so comfortable and soft, felt just like normal pants. Really did everything they are supposed to do. I have been recommending these to my running club friends and some have gone on to purchase themselves based on my review.

Flow: Heavy
Products used: FLUX Undies, obvs!, Disposable pads
Why couldn't these have been invented 25 years ago

I wish these were around when I was a teenager as I then probably wouldn't dread my period so much. Having never got on with tampons and having to put up with towels that never fit properly or leaked in places they shouldn't I've always dreaded that time of the month. Now I don't mind it. These pants are super secure, probably one of the comfiest pants I've ever worn, no having to dig them out my bum every time I walk and leak proof so far. I have a heavy flow and these usually last me my working day before I feel uncomfortable/feel that they're full/wet and need to change them. Great product will definitely be buying more. I now look forward, when the time comes, to telling my daughters about periods and that there's nothing too horrible to expect when they have them. Knowing that there are products like these that mean no embarrassing leaks or rustling wrappers in the school loos.

Flow: Light
Products used: FLUX Undies, obvs!

My daughter is really happy with her pants. Increased her confidence++

FLUX Undies are your complete replacement for pads and tampons and can be worn alone for up to 12 hours. 

 Our unique built-in tech is moisture wicking, absorbent, and leak-proof, keeping you covered day 'n' night. 

 Bikini offers full coverage without the bulk, and the soft lace waistband keeps you comfy in style. 

 - Wear all night, or for up to 12 hours during the day 

- Holds 20-25ml, more than any other product out there 

- Our customers use FLUX Bikini for periods, leaks, post-partum, and incontinence! 

- Wear them to school, work, for exercising, or simply just to feel comfortable on lazy days. 

 Find out more on how our undies work.

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