FLUX ® Fluxundies Period-Proof Panties | Full Review

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  • Official Website:
    Fluxundies.com
  • Price on Company’s Website:
    £26 – £30
  • Limited Offers:
    Get 10% OFF on your first purchase! Use “MCR” Coupon Code
    Get Free International Shipping on Orders Over £75

Do These Period-Proof Panties Pass the Test?

First, let’s clear up one of the most frequently asked questions about Flux Period Proof Underwear. These aren’t disposables. Instead, they are made with four layers of technical fabric designed to provide protection all day or night. Leakproof, antimicrobial, and absorbent enough to hold at least four tampons’ worth of fluid, which is more than any other brand of period underwear currently. These panties are designed as a complete replacement for pads and tampons, and can be worn alone even on heavy days. They come in several different style and color options. The outer layers are made with regenerated nylon, sustainably sourced from recycled fishing nets. The inner layers offer an organic blend of bamboo, cotton, and modal fabrics. All components used in FLUX Undies period panties are OEKO Tex certified free from harmful chemicals, so they are safe to wear next to your most sensitive skin.

How Do They Work?

Because they are capable of holding so much fluid, FLUX Undies period proof underwear can replace disposable feminine hygiene products on even your heaviest days. Even so, they are thin and stylish.

  • The inner layer wicks moisture away from your skin so you stay dry and clean.
  • The anti-microbial layer prevents bacteria building up, stopping any unpleasant odors.
  • The absorbent layer absorbs at least 4 tampons worth of moisture – up to 200 times its own weight.
  • The outer layer is a breathable, leak-proof barrier that prevents moisture from making its through the panties. This layer protects your clothing, sheets, and upholstery from stains.

While FLUX Undies were designed with period protection in mind, they offer coverage under a variety of circumstances. These underwear provide protection from regular discharge, occasional spotting, and postpartum bleeding, along with sweating and incontinence leaks.

These reusable period panties are safe and hygienic. Suitable for all-day wear, they contain unique antibacterial and antimicrobial fibers, but without the nano-silver coatings that can sometimes lead to irritated skin in some sensitive individuals.

It’s worth noting that these period panties are easy to care for. After wear, simply wash – either by hand, or in the machine with the rest of your laundry, but without any bleach or fabric softener. Next, line dry or air dry – but don’t tumble dry, since this will prevent the absorbent layers from working correctly.

Reusable, sustainable, comfortable, and styled to look very much like non-period-proof underwear, these panties come in several different style and color options.

Special Features:

  • Hold up to 4 tampons’ worth
  • Made with sustainable, technically advanced fabrics
  • Available in a wide range of styles from classic and practical to sensual
  • They offer a Detachable style, so you can change your underwear whist keeping your clothes on
  • Breathable, moisture-wicking, leak-proof design
  • Easy to wash by hand or machine; simply air dry and reuse
  • Available in sizes XS – 3XL

Style 1 – Flux Classic Bikini

The classic Bikini offers soft lace trim at the waist. Boasting full coverage for fresh, dry protection, these undies hold 20-25 ml (that’s 4 to 5 tampons worth of fluid), and can be worn alone for up to 12 hours. They work as a complete replacement for pads, tampons, and menstrual cups, offering full coverage without any additional bulk.

Material:  82% Nylon, 18% Lycra; Lace trim is 100% polyester

Inner Material: 50% Modal, 50% Organic Cotton

Colors: Black or Beige

Estimated Price: £28

Customer Reviews:

Flux Undies customers like this style for its practicality as well as its appearance. Overall, it’s the most popular option available.

“They really work. I was a little nervous but am delighted with how dry I feel!

“These are the best. I tested these for 11.5 hours without changing. No leaks or smell, and it doesn’t feel like you’re wearing a nappy. Perfect for heavy periods and traveling!

Limited Offers:

  • Get 10% OFF on your first purchase! Use “MCR” Coupon Code
  • Get Free International Shipping on Orders Over £75

Style 2 – Flux Thong

The Flux Thong is designed for spotting and light leaks. Its lean profile hides the fact that it can hold up to one pantyliner’s worth of fluid.

Material: 82% Nylon, 18% Lycra; Trim is 100% polyester

Inner Material: 50% Modal, 50% Organic Cotton

Colors: Black or Beige

Estimated Price: £26

Customer Reviews:

The Flux Undies thong is often the subject of surprised comments from women who are amazed that they can still wear a thong while on their period, even without a pad, tampon, or menstrual cup. Most customers mention wearing this style on light flow days, or to deal with spotting.

“My favorite for light days, and for days before and after period. They’ve saved my other underwear from being ruined.

“These aren’t the greatest for heavy days but they are my go-to for those days when I’m not sure if I’m still on my period or not. They are so cute I can’t believe they’re period underwear.

Limited Offers:

  • Get 10% OFF on your first purchase! Use “MCR” Coupon Code
  • Get Free International Shipping on Orders Over £75


Style 3 – Flux Boyshort

The Flux Boyshort offers comfortable, full coverage in a sporty design. This style features a wide elastic waistband with the Flux logo in a contrasting color. Capable of holding up to 4 tampons’ worth of fluid, these period Boyshorts are ideal for weekend, overnight, and casual wear.

Material: 82% Nylon, 18% Lycra; Trim is 100% polyester

Inner Material: 50% Modal, 50% Organic Cotton

Colors: Black or Beige

Estimated Price: £28

Customer Reviews:

Reviewers like the sporty styling of these Flux Undies Boyshorts, and they appreciate other factors such as absorbency and comfort as well.

“These boyshorts are great for my period but I love them for workouts as well, they are ideal for absorbing sweat.

“I was worried that this would feel like sitting in my own discharge. Nope! These underwear are soft, dry, and comfortable. I don’t think I’ll ever go back to pads/tampons.

Limited Offers:

  • Get 10% OFF on your first purchase! Use “MCR” Coupon Code
  • Get Free International Shipping on Orders Over £75


Style 4 – Flux Hi-Waist

Flux Hi-Waist undies provide a combination of protection and support. Despite offering full coverage, this style features attractive mesh side panels for a touch of subtle contrast. Flux Undies Hi-Waist period panties hold up to 4 tampons worth of fluid, so you can wear them all day or all night.

Material: 82% Nylon, 18% Lycra; Trim is 100% polyester

Inner Material: 50% Modal, 50% Organic Cotton

Colors: Black or Beige

Estimated Price: £28

Customer Reviews:

Flux Undies customers who suffer from cramps and bloating tend to like the high-waisted style best. Many mention that wearing these feels like a comfortable hug.

“I love these for when I’m bloated, so much more comfortable than regular underwear. The high waist feels so comforting!

“These keep me dry and comfortable all day and they’re great for wearing at night. They stay in place and don’t slip down, so no worries about leaks.

Limited Offers:

  • Get 10% OFF on your first purchase! Use “MCR” Coupon Code
  • Get Free International Shipping on Orders Over £75


Style 5 – Flux Detachable

Simple side clasps make FLUX Undies Detachable period underwear unique. This style lets you get changed without undressing completely, and despite a lean, attractive profile, it holds up to 4 tampons worth of fluid. These period panties are ideal for people who are always on the go, and FLUX mentions that they were also designed for the needs of people with disabilities or mobility issues.

Material: 82% Nylon, 18% Lycra; Trim is 100% polyester

Inner Material: 50% Modal, 50% Organic Cotton

Colors: Black or Beige

Estimated Price: £28

Customer Reviews:

Reviewers rave about Flux detachable panties, often mentioning convenience and style before getting into other factors such as absorbency.

“These are my favorite Flux panties. I would recommend going up one size from usual to feel more comfortable especially if you are bloated.

“These look like normal underwear but the detachable sides make them so convenient. Perfect for quick changes, so you don’t have to get completely undressed. Great idea.

Limited Offers:

  • Get 10% OFF on your first purchase! Use “MCR” Coupon Code
  • Get Free International Shipping on Orders Over £75


Customer Feedback

Please look at the individual customer review summaries for each style of Flux Period Proof underwear.

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About the Company

FLUX Undies are designed and manufactured in the United Kingdom by a fine garments manufacturer that have been producing clothing for well known brands for more than a century.

Workers enjoy safe conditions, fair pay, and appropriate benefits. Shipping is free to the UK and worldwide shipping is also available. Most packages ship within one to two days of order.

The Bottom Line

FLUX Undies Period Proof Underwear is well-made, with unique materials that are designed to offer top-tier performance while maintaining an environmentally-friendly stance. They are absorbent, leak-proof, and odorless, with a good reputation for keeping wearers feeling fresh and confident all day or all night.

The fact that they are able to hold an average of four tampons worth of liquid makes them a valuable asset for anyone who wishes to replace traditional menstrual products with a comfortable, body-friendly alternative, or who wants a solution for urinary incontinence or heavy postpartum flow. These menstrual underwear come in a variety of appealing styles, in sizes to fit almost every body. The company has a generous, 30-day returns policy, and when new styles are introduced, they become available for pre-order.

Where Can you Buy Flux Undies?

  • Official Website:
    Fluxundies.com
  • Limited Offers:
    Get 10% OFF on your first purchase! Use “MCR” Coupon Code
    Get Free International Shipping on Orders Over £75


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