Leakproof Thong - Proof
Proof thong front in sand
Proof thong back in sand
Proof thong detail in sand
Proof thong front design
Proof thong back in black
Proof thong black back lifestyle
Proof composition layers

Leakproof Thong - Proof

Regular price
Regular price
Sale price
Unit price
Sold out

Brand: Proof

Unseen but powerful, the thong underwear by Proof® — a US-based company founded by three sisters — works to eliminate panty lines while protecting you from leaks.

Using breathable, soft microfiber fabric with a low-rise silhouette design, the underwear offers seamless coverage for your light flow days without showing even through slim leggings!

Proof undies look and feel just like normal underwear, but have built-in leakproof technology to keep you feeling fresh and dry. The antimicrobial fibers inhibit the growth of bacteria and reduce odor, while the Quick-Wick liner pulls moisture away from the body into the fabric’s absorbent core.

Wear as you would normal undies...for nearly naked protection.

Great for: 

  • light periods
  • spotting
  • replace a panty liner
  • back up a tampon
  • discharge
  • sweat
  • odour reduction

Product Details: 

  • Patented Leak-Loc™ edges seal in leaks and prevent liquid from escaping
  • Absorbency: Up to ~10ml, equivalent to 1 Regular Tampon or 2 Teaspoons
  • Maternity-friendly 
  • Machine washable (cold water and gentle detergent, and hang or lay flat to dry)
  • Successfully tested for PFOA/PFAS, lead, phthalates, and other harmful chemicals and are Prop 65 compliant.
  • Discreet packaging.

Size : 

  • This item runs large, we recommend one size smaller than the regular Asia size.  Please refer to the size chart for the details.


Breaking the taboo: 

Proof® was founded in 2005 by three sister-preneurs.  Jodi, Kari, and Lori know that they aren’t the only ones tired of worrying about peekaboo leaks, what they can wear, and how many hours we can be away from a bathroom. 

That's why Proof was created. They are committed to creating products that — like your bestie or sister would — have your back (and booty) always. Yes, periods can be stressful, sweat stains are annoying, and sprinkles can come unannounced. But it’s time to stop crossing our fingers (and legs) hoping for the best, and start living life to its fullest potential!