period underwear that’s leakproof all day — up to 12 hours!
See ya, period stains 👋 Our new leakproof period underwear is changing the game when it comes to period protection. Thanks to our unique LeakSafe™ barrier, it’s leakproof for up to 12 hours of heavy flow (!) while staying comfy and discreet.
absorbs up to 12 regular tampons’ worth of flow
Thinx underwear absorbs your period while staying discreetly thin, so you can just slip ‘em on and go about your day. The moisture-wicking fabric and odor control technology help keep you feeling fresh, dry, and comfortable.
leakproof all day up to 12 hours
Our innovative built-in technology does it all. The 4-layer gusset absorbs your period, while the sewn-in LeakSafe™ barrier helps prevent leaks throughout the day.
see how Thinx stacks up
In a lab test, we used a replica of a real menstruating human to see which period underwear brand could stand up to 12 hours of heavy flow. Check out the results!
easy to use
You can wear Thinx on its own without any additional period products — it’s that absorbent! Or, you can use leakproof period underwear as a backup to tampons or menstrual cups. Plus, they’re machine washable. Simply throw them in with the rest of your clothes and line dry. Easy peasy.