Flux Undies Invisible Cheeks Period Underwear
Flux Undies Invisible Cheeks Period Underwear
Flux Undies Invisible Cheeks Period Underwear
Flux Undies Invisible Cheeks Period Underwear

Flux Undies Invisible Cheeks Period Underwear

(1 Review)
XS 8
S 10
M 12
L 14
XL 16-18
Flux Undies
Product Detail


  • Light absorbency
  • Great for sports
  • Ultra thin
  • Up to 2 tampons worth
  • Wear up to 8 hours

Flux Undies Invisible Period Pants Overview

The Flux Undies are ultra thin, super smooth, and truly invisible, you won't get a VPL with these.  These are a game changer in period pant underwear.  Flux Undies Invisible Cheeky are cut the shape of bikini briefs and look just like normal VPL free pants.  Flux Undies Invisible Cheeky are soft, lightweight nylon fabric, they are super stretchy, comfortable and can be worn seamlessly under anything.   I wear these under my yoga or running leggings to help with any leaks (3 children later that pelvic floor isn't what it used to be!) As they are so thin there isn't a hard vpl in my "active wear", these are now my favourite work out pants.

As the pant is so slinky the gusset feels structured in comparison as it has the extra layers of absorbency in this area. This isn't necessarily a bad thing just if someone was sorting your laundry it feels a bit thicker in that area.  The pants come in a variety of colours but the gusset area inside remains black, this can make it appear a bit dark on some of the lighter coloured outers.

What I also really like about Flux Undies Invisible Cheeky is the lack of branding all over them! Now I maybe over sensitive but I'm not a fan of branding all over my period pants, I like discrete and don't want everyone to know i'm on my period while changing in the gym.  The Flux logo and washing details are printed on a light transfer inside the pants so nothing on the outside to identify them as anything other than pants.


The breathable fabric keeps things nice and cool. With their signature absorbent gusset built-in, and absorbing up to 2 tampons' worth, you can wear them on your lighter days, for up to 8 hours. 

- Made from super smooth, breathable nylon fabric
- Lightweight, yet substantial 
- Seamless design
- Period and pee-proof, holding up to 15ml- Quick-drying
- Buttery soft hand feel 
- Brushed matte finish


Main Body 92% Nylon 8% Lycra 

Gusset: 100% Cotton, Breathable PUL


  • Quick rinse 
  • 40 degree wash 
  • Hang to dry
  • No bleach or fabric softener
Pants FAQ's

How many pairs of period pants do I need?

We tend to find that 5-7 pairs of underwear are enough for the average cycle.  2 Night time pairs and 3-5 day time pairs means that you have enough to wash every other day and ensure that they dry in time for their next use.

Machine Washing Period Underwear.

Washing period pants in the washing machine is the most effective way to care for your undies.

Here is a basic guide to wash period pants:

  1. When you remove your used underwear rinse them thoroughly with cold water till the water runs clear. You can gently rub them to help remove as much blood as possible.
  2. Either pop them in your normal washing with other clothes or store them in a wet bag until wash day.
  3. Wash on a cold wash at either 30 or 40deg. You can use your normal detergent but avoid fabric softener.

Most companies will advise you to avoid harsh chemicals, fabric conditioner and tumble drying, as eventually it will lead to a shorter life span and issues with performance.

Customer Reviews (1)
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1 Review:

Brilliant VPL free
12 January 2021  | 

Love these I use them for sports you can't see them through my running leggings. They look like ordinary pants. Very happy with them.

1 of 1 people found this review helpful.
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