Leakproof undies Boy Brief

29,00 €


* Size

Qty.: - +

Wear on heavy days
holds 4 tampons' worth / 20-25ml

  • Wear for up to 12 hours on heavier days
  • Holds four tampons' worth or 20/25ml
  • For periods, leaks & incontinence
  • Great for day and night.
  • OEKO-Tex certified materials

Style + fit
Made with soft 'n' sustainable modal fabric on the inside, smooth nylon outside, and chic mesh panels for added style. The super absorbent gusset means they feel like normal undies, but keep you fresh 'n' dry all day.
Fabric + care
Inner: 95% TENCEL Modal 5% Elastane,
Waistband: 100% Polyester,
Gusset: Absorbent blend, Breathable PUL
Care: Quick rinse - 40 degree wash - Hang to dry - No bleach or fabric softener

  • Sustainably sourced
  • Ethically manufactured
  • 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


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. FLUX Undies combines four layers of ultra-thin materials that are moisture wicking, anti-microbial, absorbent, and leak-proof so you can say goodbye to pads and tampons. FLUX Undies is also used for post-partum, bladder leaks, and discharge.

What does period-proof mean?
Period-proof means that the lining of the underwear is designed to absorb moisture from vaginal discharge, sweats, bladder leaks, and periods, without leaking. Our underwear consists of four thin layers of protection that make this possible.
Top layer: moisture wicking, so that you stay fresh as a daisy.
Second layer: anti-microbial, keeping you squeaky clean.
Third layer: absorbs moisture, so you don’t feel wet.
Fourth layer: leak-proof, so you're worry free.

Can FLUX Undies replace pads & tampons?
Yes, FLUX Undies replaces pantyliners, pads and tampons. Our absorbent lining holds up to 10x its weight and absorbs moisture at rates 20x faster than cotton. This allows FLUX Undies to absorb up to 4x the amount of a regular pad and hold for up to 12 hours depending on your flow. You will know when it’s time to change your FLUX Undies, but it will not be visible to anyone else!

Can I use them for bladder leaks?
Yes, that’s why we say FLUX Undies is so versatile! They can be used for periods, post-partum, bladder incontinence, and bladder leaks.

How do I wash my undies?
FLUX Undies should be cared for just as any other underwear. Simply rinse after use until the water runs clear, then wash them at 30 degrees, and hang to dry. Please do not tumble dry / add fabric softener - this will damage the absorbent tech.

Is FLUX Undies hygienic?
Of course. The built-in protective panel has natural antimicrobial and antibacterial properties, due to the way in which the blood is locked and prevents further microbe growth, so you will feel fresh at all times.
How long can I wear them for?
FLUX Undies absorbs up to 4x the amount of a regular pad and hold for up to 12 hours, depending on your flow. You will know when it’s time to change your FLUX Undies, but it will not be visible to anyone else!

How is FLUX Undies different from other brands?
FLUX Undies replaces pads and tampons, and can be worn alone during even heavy periods rather than just acting as a back-up to a pad/tampon. We also offer a clever and easy way to change without stepping foot off the ground, in even the most inconvenient spaces, with our simple side clasps.