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'. 

FLUX Boyshort


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

Slightly short for a boy short maybe, but super comfy and very protective. I have a little VPL but with their sizing recommendations it's not a lot and you feel very secure in them. This was my first time testing out period underwear and I'm def getting some more!

Flow: Moderate
Products used: FLUX Undies, obvs!, Tampons, Menstrual cup
great quality as always

these ones are as cute and lovely as all the others :) already my third pair

Flow: Light
Products used: FLUX Undies, obvs!, Cloth pads

They take a long time to dry after washing. Otherwise great product. Would recommend

Flow: Super Heavy
Products used: FLUX Undies, obvs!, Disposable pads, Menstrual cup
Comfortable but

These are super comfortable and soft, not bulky at all like I was worried they'd be. They also absorb a decent amount, but the panel feels like its too short. When I was sitting down and leaning back, a bit leaked past the absorbent part and bled through the back. Definitely couldn't wear it at night. If the panel extended all the way back, it would be perfect.

Flow: Super Heavy
Products used: FLUX Undies, obvs!, Disposable pads
Safe, secure stylish and comfy.

Changed the way I cope with my period. No anxiety, no worry, no extra pants in my bag- just in case. And no more late night loo visits. Thank you!

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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