Join Our Rewards Program
Earn rewards and exclusive member-only benefits for free.
Super Leakproof® No-Show Thong
New & Improved
Super Leakproof® No-Show Thong
$32.00
CAD
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
32 Points
You May Also Like
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.
Zoom
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
Our Best-Selling Underwear
Shop All
#1 Overnight Solution
Super Leakproof® Dream Short™
$48.00
CAD
Buy 3+ Save 15%, Buy 5+ Save 20%
Color: Eucalyptus Limited Edition
+3
Leakproof UltraThin No-Show High Rise
$32.00
CAD
Buy 3+ Save 15%, Buy 5+ Save 20%
Color: Indigo Limited Edition
+6
Best Seller
Super Leakproof® Dream Boxer™
$48.00
CAD
Buy 3+ Save 15%, Buy 5+ Save 20%
Color: Eucalyptus Stripe Limited Edition
+2
#1 Daytime Solution
Leakproof UltraThin No-Show Bikini
$27.00
CAD
Buy 3+ Save 15%, Buy 5+ Save 20%
Color: Eucalyptus Limited Edition
+6
Leakproof UltraThin No-Show French Cut
$27.00
CAD
Buy 3+ Save 15%, Buy 5+ Save 20%
Color: Eucalyptus Limited Edition
+4
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: 250 Total 3 star reviews: 111 Total 2 star reviews: 62 Total 1 star reviews: 95
89%would recommend these products
1,871 reviews
- Rated 5 out of 5 stars4 minutes ago5 Stars
Very nice
RayvonReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars4 minutes ago5 Stars
Very nice.
RayvonReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars5 minutes ago5 Stars
Soft material. Very confortable. Please with this purchase.
RayvonReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 hours 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 stars2 days 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 stars4 days 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 5 out of 5 stars1 week 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 stars1 week 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 stars1 week 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 stars1 week agoJob done well
No show panty line.
No leaks.
All well in these undies.
CharlotteVerified BuyerReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 weeks ago5 Stars
Perfect for the gym! No leaks when I’m on the treadmill or doing jumping jacks 🙏🏻
RachelReviewingSuper Leakproof® No-Show Thong - Rated 5 out of 5 stars2 weeks agoFantastic Thong
I have purchased several leak proof panties including thongs from other companies before I knew about Knix.
I found my Knix thong to not show under my yoga pants at all and really comfortable. They did absorb leaks well and I was very pleased with my Knix thong!
Marci S.Verified BuyerReviewingSuper Leakproof® No-Show Thong
