THINX period underwear - light day thong

More than 12 billion pads and tampons are thrown out every year, and the average person with a period uses 11,000 pads, tampons, and panty liners in their lifetime - that's a lot of landfill waste, money, and trips to the drugstore!

Now when you get your period, you can opt out of wasteful and expensive disposables, and just wear underwear like any other day. These period underwear are made with organic cotton and THINX signature tech that absorbs your flow, controls odor, helps prevents leaks, and keeps you fresh ‘n’ dry — all without feeling bulky or wet.

The thong style is perfect for light days - it holds up to ½ a regular tampons' worth. It can be used alone, or as a backup for a menstrual cup. We also carry a bikini version for medium days, and a brief version for heavy days.

Use & Care

Wear instead of a pad or pantyliner during your period.

Between uses, rinse, throw in the washing machine (cold or warm water), and hang dry. No bleach, fabric softener, or irons.

Size / Materials 

Fits true to size. Because THINX uses special technology to keep you leak free, the sizes fit a bit more snug than your average run-of-the-mill undies.

Your hip measurement is the most important size to consider when trying to find the perfect fit.

Can't find your size? We're discontinuing this item at our shop, but we're still huge fans of Thinx. We encourage you to shop directly with them here.

Size chart:










35 - 36" 37-38" 39-40" 41-42" 43-44½"


Jean size (US)







  • Body: 95% organic cotton, 5% elastane
  • Gusset: 95% cotton, 5% elastane; middle breathable PUL


Comes wrapped in an informational and recyclable paper sleeve, and a safety-sealed compostable bioplastic envelope.


Sourced from THINX, Inc. a socially and environmentally conscious company based in New York, USA, based upon the pillars of advocacy, education, and access. THINX, Inc. has been hard at work creating innovative products, and breaking the period taboo since January 2014.

Made in Sri Lanka, at an award-winning facility that operates under three pillars: female leadership, employee well-being, and environmental sustainability.

End of Life

Due to the mixed materials in this fabric, it can't be fully composted. We recommend you donate it to a textile recycling facility, such as Threadcycle.

Customer Reviews

Based on 1 review
JULIA J (Scarsdale, NY, US)
Love them

Good for any old day honestly. I have a big bum so I wear thongs often because they are more comfortable for me (not lingerie thongs tho, come on, those are horrendous).