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Super Leakproof® No-Show Thong
New & Improved
Super Leakproof® No-Show Thong
$29.00
USD
Buy 3+ Save 15%, Buy 5+ Save 20%
Now absorbs about 4 super tampons
1.5" added to gusset for extra protection
Invisible under clothes
Machine washable
Size and Fit Guide
How to Measure
In order to select the correct sizing, we recommend you take the following measurements using a soft tape measure. If necessary, ask someone else to help.
Waist
Measure around the narrowest part of your torso, usually just above your belly button. Keep the tape snug and level, but not tight. The number where it meets is your waist measurement.
Hip
Stand with your feet together and measure around the fullest part of your hips and buttocks. Keep the tape level and snug, but not tight. The number where it meets is your hip measurement.
Build Your 3-Pack
Super Leakproof® No-Show Thong
Super Leakproof® No-Show Thong
Super Leakproof® No-Show Thong
Rewards Members Earn
29 Points
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Product Description
Comfort-First Fit
Thong style with a mid-rise fit and minimal bum coverage.
Worry-Free Protection
Our newest leakproof innovation provides more absorbency without the bulk. Patented 360 LeakSeal™ technology locks in leaks at every edge.
Moderate Absorbency
Absorbs 4 super tampons worth of liquid—perfect for heavy flow days, overnight protection, and light bladder leaks.
No More Panty Lines
Easy to Wash
Machine washable just like regular underwear.
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How to Choose?
Essential
- • Days you don’t need leak protection. Everyday freshness and moisture wicking.
-
0 tsp
Heavy
- • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
-
about 8-14 tsp
-
about 1.5-3 regular pads
-
about 4-7 super tampons
-
about 1.5-3 menstrual cups
Light
- • Daily freshness. For sweat, discharge, period spotting, or backup protection.
-
about 1-3 tsp
-
about 1-3 pantyliners
-
about 1-3 regular tampons
-
about 0.5 menstrual cups
Moderate
- • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
-
about 4-8 tsp
-
about 1-1.5 regular pads
-
about 2-4 super tampons
-
about 0.5-3 menstrual cups
Ultra
- • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
-
about 15-20 tsp
-
about 1.5-2.5 super pads
-
about 7-11 super tampons
-
about 2-3 menstrual cups
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PATENTED LEAKPROOF TECHNOLOGY
Built-in protection that feels like nothing at all
Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 3-6 super tampons worth of liquid so you feel fresh and in-control.
Soft Top Layer
Middle Layer
Leakproof Layer
Bottom Layer
Recently Viewed
How to wash
Knix underwear is 100% reusable and machine washable, just like your regular undies.
Not required. But for best results, you can rinse your leakproof with cold water in the tub or sink before washing.
Machine wash on a cold, gentle cycle with mild detergent.
For their longest life, air drying is best. Hang or lay flat to dry.
Fabric softeners, bleach, ironing, or heat from the dryer.
Total 5 star reviews: 1.4k Total 4 star reviews: 249 Total 3 star reviews: 108 Total 2 star reviews: 62 Total 1 star reviews: 96
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 3 days ago
Customers say these thongs are comfortable and feel like regular underwear, with many praising their effectiveness for light leaks and daily wear. Many reviews mention the soft, silky material and good absorption capabilities. Users appreciate that they don't show under tight clothing like yoga pants and leggings. However, some customers report sizing inconsistencies, with several noting they needed to size up or down from their usual size. Common concerns include the absorbent pad placement being too far forward and not extending far enough back, causing potential leakage issues. Some find the front area bulky or thick, making them visible under certain clothing. While most customers love the comfort and protection, a few experienced chafing or skin sensitivity with extended wear.
89%would recommend these products
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1,872 reviews
- Rated 5 out of 5 stars2 days agoMust Buy
Don’t pass on these
KatieVerified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 1 out of 5 stars2 days agoNot worth the money
Absorbency is non existent
Alexandra A.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars1 week agoI am in love
I will never go back. I fell in love with period underwear. The only thing is I had to order again because they fit a little small. I am usually a medium and had to order large.
But other than that they are perfection. I don't feel them at all and I even want to start wearing them even if I am not on my period, they are THAT comfortable. I wear them with a cup so these are perfect for a light/mild flow.
Stéphanie H.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars1 week agoWould buy again!
I was very interested in how well the thong would work. Absolutely the same as the bikini/briefs. I wore the thong to the gym and had no problems even with all my movements. I need to buy 6 more!
Melanie L.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars1 week agoFinally no diaper look
The other models feel like I’m wearing a diaper and these don’t.
Christine E.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 4 out of 5 stars1 week agoComfy
Like these, nice fit and feel comfortable.
Donna J.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Original - Last Call - Rated 5 out of 5 stars2 weeks agoStocking up on more!
Tried these for a full period cycle and LOVED them. Immediately ordering more!
Kate S.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 weeks agoObsessed!
I've been hunting everywhere for a period thong, and these are PERFECT! I feel protected during my period days, and these are some comfortable. I will absolutely be purchasing more of these, and I would highly recommend them.
Haydn W.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 weeks agoCute & effective
These are cute & effective. They are great for periods and bladder leaks.
Sharon S.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 weeks agoJob done well
No show panty line.
No leaks.
All well in these undies.
CharlotteVerified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 4 out of 5 stars3 weeks agophenomenal
I’ve been trying to find reusable period products for a while and was nervous about spending a larger amount on period panties. Purchasing these was one of the best things I did! They do fit on the snugger side, but I didn’t find them to be too small, just tighter to keep the pad part close as possible. I can confidently leave my house without the worry of leaking everything. As someone who changes her Diva cup after 6-7 hours (changed a super+ every 3-5 hours), this is new for me and it feels amazing!! 10/10 recommend
Avery B.Verified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 1 out of 5 stars3 weeks agoTerrible Thong, uncomfortable and not leakproof
The front of the Thong bulges out, very unappealing. And it is not leakproof. I unfortunately ordered 4 of these, I do not recommend.
Lisa H.Verified BuyerReviewingSuper Leakproof® No-Show Thong
