Leakproof No-Show Thong
30% off
• Great for peace of mind protection, the ultra-thin liner absorbs about the same as 2.5 super tampons or 1 regular pads worth of liquid.
• Switch from relying on disposable products and stop worrying about leaks.
• Patented bonded edges help prevent against side leaks.
• Modal top layer of the liner helps move moisture away from your skin.
• These underwear feature our signature buttery soft fabric that is invisible under clothes, including workout leggings.
• Machine washable just like regular underwear.
Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.
• Mid-rise silhouette
• Minimal bum coverage
• Built-in liner, 8-9" long
• Absorbs the same as about 1 regular pad or 2 super tampons
• Quick dry extended gusset
• Soft, stretchy PerformaStretch® fabric
• Conforms to your body
The fabric is designed to feel snug at first but relax with wash and wear for a perfect fit.
Body: 70% Nylon, 30% Spandex; Gusset 1st Layer: 84% Modal, 8% Seaweed, 8% Spandex; Gusset 2nd Layer: 100% Polyester; Gusset 3rd Layer: Fresh Fix Technology®; Gusset 4th Layer: Polyurethane Film
Additional Product Ingredient Information
🇺🇸 Free standard shipping over $100*.
Duty-free. (after discounts, before shipping + taxes)
EXCHANGE ONLY Items on sale during our Anniversary Sale are exchange only. For items with a 20% or more discount you may exchange for another item or store credit. No refunds.
Your leakproof questions, answered.
Our Leakproof technology features a built-in absorbent liner. Depending on the style you choose, the absorbency can range from about 1-17 tsp of liquid. The result? Confident protection from sweat, discharge, periods, and light bladder leaks.
A gusset is essentially a liner. It’s where you’ll find our leakproof technology. It’s built into the crotch section of the underwear.
Coverage at Knix comes in all shapes and sizes. If we’re talking about silhouettes, we go all the way from thongs to boxers.
We also offer high rise styles, like the Leakproof UltraThin No-Show High Rise, that sits just above the natural waist and gives full coverage through the stomach, hip & bum.
For extra liner coverage, look for undies that have an “extra-long liner” (usually 10”-14”), like in our Dream Short. And our Ultra Zones+ also have full bum coverage, too.
Have a suggested style or coverage? Just let us know. We love the feedback!
Many people refer to them as period underwear or period panties. But leakproof underwear covers you for all of life’s leaks, including periods (even your heaviest flows), sweat, light bladder leaks, postpartum, and discharge.
- Sarah E.Verified Buyer4 days agoRated 5 out of 5 starsKnix is the best!
Forever grateful I discovered knix. Quality is always amazing and underwear is unbelievably comfy.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - Kaitlyn N.Verified Buyer2 weeks agoRated 5 out of 5 starsComfortable
Very comfortable and easy to use. Can be a little frumpy in front tho
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 4.0 on a scale of 1 to 5Poor ExcellentFitRated 1.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - Dar C.Verified Buyer2 weeks agoRated 5 out of 5 starsThese are very comfortable
I really like my new leakproof no show thong.
They are very comfortable and give me confidence not to worry if I have bladder leakage! I will definitely buy more to eventually have enough for every day!
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful?
