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 46 reviews
Flow: Light
Products used: FLUX Undies, obvs!

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

Flow: Heavy
Products used: FLUX Undies, obvs!
Supercomfy & secure!

I switched over to period pants a few months ago, after having used tampons for twenty years. I switched for environmental reasons & because I no longer felt comfortable putting a bleached product inside of me. Of the three different brands of period panties I own, Flux (the most recent addition) is absolutely my favourite: the fit of the boyshort is snug and comfortable, and takes away any worry for leaks during the day or night. Would recommend!

Flow: Super Heavy, Heavy
Products used: FLUX Undies, obvs!, Tampons, Disposable pads

I've been attempting the switch to period panties instead of pads or tampons. I tried the cup and we are not friends at the moment. Tampons have always been uncomfortable. So I've been wanting to find a product that I don't have switch after 4 hours or throw away. I tested out the boyshorts on my first and heaviest day. I will also say that this last period was the heaviest its been in a while. The panties held up for just over 8 hours. When I got home from work I noticed that I had just begun to leak through the sides. I could feel that the panties were at their capacity so I am impressed that they held up well enough until I got home after 8 and half hours on a super heavy day. They are very comfortable and easy to clean. I felt like I could have gone a size smaller because I want them to be snug all around, but I was afraid the leg holes would be too small if I exchanged them. According to costumer service, the leg holes eventually stretch out. I ended up keeping the mediums I originally ordered and they fit just fine. I plan on ordering more!

Flow: Heavy, Moderate
Products used: FLUX Undies, obvs!, Tampons, Disposable pads

So much more comfortable and less hassle than tampons and pads and environmentally friendly.

Flow: Moderate
Products used: FLUX Undies, obvs!, Disposable pads
First timer, not looking back!

I’m literally wearing them as I sit: I think these underwear are honestly one of the best purchases I’ve ever made. I’ve never worn anything other than a disposable pad or a tampon, cups scare the life out of me! I’m wearing these on my second day period and oh my god it’s amazing! I feel like I’m wearing normal knickers and not a nappy😂 the flow sits on top so you can see how much you’ve bled (be this positive or negative depending on your view) but it feels like a normal day. I wish I’d have found these sooner.

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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