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Leakproof UltraThin No-Show Bikini Kit*
Leakproof UltraThin No-Show Bikini Kit*
$27.00
CAD
Absorbs about 2.5 super tampons
Invisible under clothes
Moderate protection without the bulk
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.
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Comfort-First Fit
Bikini silhouette with a classic mid-rise fit, medium hip and 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 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.
No-Show Style
Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.
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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Total 5 star reviews: 550 Total 4 star reviews: 77 Total 3 star reviews: 48 Total 2 star reviews: 32 Total 1 star reviews: 46
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 1 week ago
Customers say these period underwear are comfortable and provide effective protection without the bulk of traditional pads. Many appreciate the soft, buttery fabric that feels like regular underwear and the no-show design under clothing. Users frequently mention confidence during workouts, daily activities, and even swimming. Parents often purchase these for teenage daughters who love the comfort and security they provide. Common feedback includes praise for the absorbency and leak-proof performance. However, several reviews mention sizing inconsistencies, with some finding recent purchases run smaller than previous orders. A few customers note the leg holes can feel tight or that the fit varies between different fabric types.
85%would recommend these products
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753 reviews
- Rated 5 out of 5 stars3 minutes agoSleek!
My girls LOVE these no-show undies! They like the feel and that they aren't bulky at all. They work well and keep my girls feeling confident and comfortable.
Julie D.Verified BuyerReviewingTeen Leakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars19 hours agoVery comfortable
I have been excited to try ever since the birds papaya shared these. They are even better than I thought they’d be!
Catie S. J.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars22 hours agoGreat for autistic tween
These are great for a child with special needs who gets overwhelmed with period products.
Kelly B.Verified BuyerReviewingTeen Leakproof UltraThin No-Show Bikini 3-Pack - Rated 5 out of 5 starsYesterdayBetter than I expected
Can't wait to order more. I have tried a couple other "period panties" and these by Knix arw by far the best!
Amanda F.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 starsYesterdayCute print comfy fit
Absolutely love the print I got on these and they fit so wonderfully now that I've figured out my sizing
Alexandra B.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 starsYesterdaygreat
perfect
Julie L.Verified BuyerReviewingTeen Leakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars3 days agoAprilO
Leakproof underwear great for light bladder leaks
April O.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars3 days agoLeakproof
Great for light bladder leaks
Cindy O.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars3 days agoAbsolute Favourite
While I’m writhing in pain, the last thing I want to worry about is leaking. This product has given me comfort and ease of mind.
April J.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars4 days agoLove them!
They work well, are comfy, can throw them in the wash, and no-show.
Caitlin F.Verified BuyerReviewingPOS - Leakproof UltraThin No-Show Bikini Shimmer 3-Pack - Last Call - Rated 5 out of 5 stars4 days agoAmazing
Can't say enough about these panties. They absolutely deliver what is promised. So comfortable it feels like you are wearing nothing!!
On those hot and humid days when you are working out or working hard these are the best to wick away that unwanted moisture.
Dianna N.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars4 days agoAwesome leakproof
Love my no show leakproof panties.
Meryana V.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini