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Leakproof UltraThin No-Show Bikini 3-Pack
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Leakproof UltraThin No-Show Bikini 3-Pack
$68.00
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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68 Points
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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 your 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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Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 3 months 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.
86%would recommend these products
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830 reviews
- Rated 5 out of 5 stars4 minutes agoLove these!
Exactly what I wanted
ABAllison B.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini Black with White Polka Dot / XXL - Rated 5 out of 5 stars10 hours agoUltra thin no show bikini
These are great, comfortable.
DQDiane Q.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 starsYesterdayComfiest Period Ever
I’ve been wearing period underwear from The Period Company for years, but I was due for new pairs. However, I dreaded shopping for ones. I have trouble finding clothes in general (I’m 4’11” and roughly 105 pounds). Knix made it easy! I purchased their XS in light and moderate just to try, but they were a little too tight. The exchange process was literally the click of a button, no major hoops to jump through. The S was a bit snug at first, but it molded to my body as I wore it. By the end of the day they were easily the comfiest pair of period underwear I’ve ever owned. I use a disc + period underwear as backup on my heaviest days, so I initially used the light on my first day and the moderates for backup the next couple days. The light coverage was a bit too light, so I’ll have to rethink exactly what I need for what stage of my cycle. But no worries—they were comfortable enough I knew I wanted to stick with Knix, so I just ordered the next absorbency level. Clean up was a cinch as well—I just squeezed out the gusset under cool water, put a little enzymatic cleaner on it, and threw it in with the wash, then allowed it to air dry.
LBLauren B.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars5 days agocomfy
so comfy and it ACTUALLY didn’t show i was impressed. i’ll def be getting more!!!
CDCollette D.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars6 days agoWorry free
These underwear are so comfortable and so smooth! They fit great, and I always feel confident and don't have to worry about any stains or leaks of any kind!
TMTanya M.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini Rose Water / L - Rated 5 out of 5 stars6 days ago5 Stars
Love the cute pattern! Comfy and seamless
LLyndsayReviewingLeakproof UltraThin No-Show Bikini Black with White Polka Dot / S - Rated 5 out of 5 stars6 days ago5 Stars
Perfect fit! Seamless and comfortable
LLyndsayReviewingLeakproof UltraThin No-Show Bikini Blackberry / S - Rated 5 out of 5 stars1 week agoLove my period panties!
I love my Knix period panties so much. I'm 5'3", 140 lbs, and I started off with the medium. They were snug but comfortable, and I've learned over time that they stretch as thwy relax. I now start off with smalls and let them relax to a comfy size.
KPKarissa P.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Last Call Meadows / S - Rated 5 out of 5 stars1 week agoLOVE 💕
These bikini undies are so cute, and do the job really well! So glad I purchased them 😊.
BKBarbara K.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini - Rated 5 out of 5 stars1 week ago5 Stars
Bon produits et livraison rapide.
LLucieReviewingLeakproof UltraThin No-Show Bikini 3-Pack - Last Call Eucalyptus/Rose Quartz/Rosewood / XS - Rated 5 out of 5 stars1 week ago5 Stars
Love these great colour
BBrooklynReviewingLeakproof UltraThin No-Show Bikini Blackberry / M - Rated 5 out of 5 stars1 week agoGreat
Awesome. Been wearing this style for more than a year now. They fit well, stand up over time, comfortable and very functional.
MBMelissa B.Verified BuyerReviewingLeakproof UltraThin No-Show Bikini Black / L