Classic Boyshort - Light Flow
Classic Boyshort - Light Flow
Classic Boyshort - Light Flow
Classic Boyshort - Light Flow
Classic Boyshort - Light Flow
Classic Boyshort - Light Flow

Classic Boyshort - Light Flow

Regular price £24.95
Tax included. Shipping calculated at checkout.

Get comfy on your period with our leak-proof Boyshort period pants, featuring our classic logo elastic waistband full of stretch and softness. Our period pants features a unique built-in panel of dreamy tech that is moisture wicking, absorbent, and leak-proof, so you can wave goodbye to stained sheets and midnight leaks. Boyshort gives you the ultimate comfort and protection during your period, day and night.  

  • For periods, leaks and incontinence
  • Holds 2 Tampons' Worth / 10-15ml
  • Wear For Up To 8 Hours Leak-Free
  • Soft, Stretchy and Comfortable
  • Lightweight and Quick-drying
  • OEKO-Tex Certified Materials
  • Free From Toxins, Chemicals and PFAS/PFOA

Materials: Body95% TENCEL Modal 5% Elastane Gusset: 95% TENCEL Modal 5% Elastane, Breathable PUL Packaging: 100% Recycled and Recyclable Cardboard

🍃 Bleed Green: Each pair of our period pants replace 200+ disposables from going to landfill, reducing your waste by 99.5%

🤝 Giving Back: For every purchase, we give back to someone in need. Find out more about our #ByYouForThem giving back scheme here

We offer free shipping on all UK orders and free shipping on International orders over £75.
For same-day dispatch and next day delivery, please place your order before 1pm.
All orders are dispatched from our UK warehouse using trusted couriers such as Royal Mail, DHL and DPD. 
Think our period pants sound too good to be true? Take them on a risk-free trial for 60 days!

If our undies don't work as promised, let us know within 60 days and we'll refund you, no questions asked. The 60-day risk free trial applies to one worn pair of undies only. Refunds will be paid to the original payment method that was used to place the order.
🚿 Rinse after use.
🧽 Machine wash on 30-40 degrees.
 🍃 Hang to dry or dry indoors on a radiator.
⚠️ Do not use fabric softener or bleach. No tumble drying.
And that's it! Your FLUX Undies are ready to wear again!

Our Period Pants Are:

Sustainably Manufactured

We only use eco-friendly materials that are sustainably manufactured

Vegan and Cruelty-Free

Made from natural materials and never with animal materials or testing

Free From Nasties

Certified safe for skin and free from toxins, chemicals and fragrances.

60-Day Money Back Guarantee
How They Work

Our period pants absorb up to 5 tampons' worth of liquid, yet they look and feel just like regular undies.

Our built-in tech works like this:

1. Top layer wicks moisture away from the surface quickly, to keep you dry

2. Our middle layers absorb your blood and lock in your flow

3. The bottom layer pushes liquid back up and keeps you leak-free

It's simple. Just wear, wash and reuse.

Blood, Sweat, Whatever.

Three layers of fabric absorbing liquid showing how period pants work

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Customer Reviews

Based on 39 reviews
Alanna Wakeford (Devizes, GB)
Flow: Moderate
Products used: FLUX Undies, obvs!
Very comfy

Really comfy and soft and just like a normal pant. The only small thing for me is that the pad could do with being a little longer as I have found sometimes at the front it doesn’t cover as high as I would like.

Sara Larsgren (Handen, SE)
Flow: Heavy, Moderate
Products used: FLUX Undies, obvs!
Get at least 3 or more

I love them, but I would love to get some more so I dont have to wash them so often

Laura Corbett (London, GB)
Flow: Super Heavy
Products used: FLUX Undies, obvs!

I bought this underwear over TWO years ago now, and they still last.

I have heavy, clotting periods and I go through 3 pairs in 24 hours and they're fantastic. I wake up, put on a fresh pair and they last me all the way through work, come home, shower, new pair then a new pair before bed to make sure. Cannot reccomend them enough.

Leah Ingrouille (Chelmsford, GB)
Flow: Moderate
Products used: Menstrual cup
Peri menopause

With cycles all over out of sync these are great and comfy to wear as normal pants if you feel that you might come on whilst busy doing life.
Preferred the fit of these to the high waist which really were too high and not very stretchy.

TB (Scunthorpe, GB)
Flow: Heavy
Products used: FLUX Undies, obvs!, Menstrual cup
Converted cup user

Okay so I was a little bit dubious about these period pants as I HATE wearing pads, I find them mega uncomfortable and don’t like “feeling” like I’m on my period. Honestly these pants are a bit of a game changer! I’m generally a pretty heavy bleeder so I wasn’t sure whether these would suit me day to day, and particularly at night! But they are so comfy, I feel really secure while wearing them, I don’t have to worry about dashing off to sort my cup out or worry about leaks while I’m at work! I usually wear a cup but towards the end of my period it becomes quite uncomfortable and tedious to change, I have total peace of mind while wearing these and have recommended them to a few people already! You don’t get that wet feeling you do with pants, they don’t bunch or get any thicker no matter how much they absorb! They’re amazing, I’ve bought two pairs and am writing this review to get a discount on my third! Well done Flux Undies, I’m converted!!

Toni (Hamburg, DE)
Flow: Moderate
Products used: Menstrual cup

Comfy and feels really good on my skin. In comparison to other brands, this I highly recommend !