Period Briefs


Reusable period briefs made with soft and breathable organic cotton. TOM Organic period underwear holds up to two regular tampons' worth of menstrual fluid.

Product details

The Period Brief made for modern women. Know the Difference.


Designed to fit into your lifestyle, our Period Briefs look and feel like regular underwear. A tried and tested leak-proof design, black in colour and with flat seaming for a seam-free streamlined look. Our period underwear has been designed with a unique 4 layer leak-free system that uses the natural properties of organic cotton fabric to wick away moisture, absorb menstrual fluid and protect against stains and leaks.

TOM Organic period briefs absorb up to two regular tampons' worth of fluid. Perfect to wear overnight, on light flow days or as back-up layer of protection for a cup or tampon.


  • Made with breathable organic cotton
  • Absorbs up to two regular tampons' worth of fluid
  • Full leakproof coverage for day or night
  • Available in eight sizes from 2XS to 3XL
  • Super soft elastic mid-rise waistband for ultimate comfort
  • Easy care: rinse in cold water, machine wash, line dry
  • Responsibly made in China.


At TOM Organic, people and the planet are our top priority; which is why we've been making world-class organic pads and tampons, free from chemicals and synthetics, since 2009. 

We created this reusable range so you can now have the freedom to choose the best period product to suit your lifestyle. Use our Period Cup and Period Brief alongside your existing TOM Organic products or as a complete replacement.

Whatever you choose, we have you covered. 

Conscious period care for your health and the planet. 


  • BODY: 95% Organic Cotton, 5% Elastane 
  • INTERNAL ABSORBENT LAYER: 85% Cotton, 15% Polyester
  • LEAK-PROOF LAYER: PUL (Polyurethane laminate fabric)
  • WAISTBAND: Elastic
  • PACKAGING: Cardboard - 100% recyclable and biodegradable



For help on picking the right size, check out our period underwear size guide here

Based on feedback, we recommend sizing up from your regular size. (i.e. If you usually wear a size 10, we suggest buying a size 12). 

Any other questions? Please refer to our Reusables FAQs

Customer Reviews

Based on 76 reviews
don't have to worry about leeking at night

I bought 3 pairs of s size briefs.
I'm satisfied to use them.
For me, my period isn't heavy.
So I just use 1-2 briefs (average 1) per day.
Highly recommended!!

So good I bought 3 more!

Not sure why it took me so long to try these. They're genius. So nice to sleep in as well!

Period briefs

Love the brief in general. Any chance the absorption part could come a little higher at the front. I bough 2xl.

Thank you for offering your feedback regarding our newly released period brief! We certainly embrace all thoughts and I will be sure to note this with our product development team. Have a wonderful day ahead x


Good quality and very comfy. I have the modibodi too but these are much much better.

Very good, but not great

I love this brand! And I'm happy with my purchase, they are just a lot thicker than other period undies I've bought. You can really tell you're wearing period undies, they feel much thicker than a pad and the thickness goes over a much larger area, almost the whole undie. Which I guess is great if you're wanting them as your main thing for your period, but not as good if you want them just as extra confidence going to sleep - which is what I purchased them for.