Join Our Rewards Program
Earn rewards and exclusive member-only benefits for free.
Light Leakproof No-Show Bikini
Light Leakproof No-Show Bikini
$25.00
USD
Buy 3+ Save 15%, Buy 5+ Save 20%
Absorbs about 1 regular tampon
Invisible under clothes
Perfect for daily wear
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
Light Leakproof No-Show Bikini
Light Leakproof No-Show Bikini
Light Leakproof No-Show Bikini
Rewards Members Earn
25 Points
You May Also Like
Product Description
Comfort-First Fit
Bikini silhouette with a classic mid-rise fit, medium hip and bum coverage.
Worry-Free Protection
Our original leakproof technology provides a barely noticeable feel. Patented bonded edges help prevent side leaks.
Light Absorbency
Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.
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.
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
Selling Fast
Super Leakproof® Mini Dream Boxer
$48.00
USD
Buy More, Save More
Color: Pink Party Limited Edition
+2
Restocked
Super Leakproof® Dream Boxer™
$48.00
USD
Buy More, Save More
Color: Blue Stripe Polka Dot Limited Edition
+2
Best Seller
Super Leakproof® Dream Short™
$42.00
USD
Buy More, Save More
Color: Blackberry Limited Edition
+3
Leakproof UltraThin No-Show High Rise
$32.00
USD
Buy More, Save More
Color: Rose Water
+3
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 1 regular tampon worth of liquid so you feel fresh and in-control.
Soft Top Layer
Middle Layer
Leakproof 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: 4.8k Total 4 star reviews: 890 Total 3 star reviews: 361 Total 2 star reviews: 194 Total 1 star reviews: 201
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 2 months ago
Customers say these underwear are incredibly comfortable and feel like wearing nothing at all. Many appreciate the soft, butter-like fabric and no-show design that works well under tight clothing without visible panty lines. Users find them effective for light protection during periods, spotting, or minor bladder leaks, with many praising the confidence they provide for daily wear. Common feedback includes that they run small, with several reviewers recommending sizing up for better fit. Some mention the absorbent area could extend higher in the front for better coverage. While most love the comfort and functionality, a few note issues with side leakage or fabric breathability.
91%would recommend these products
Search
Keywords
Rating
Height
How do you use your Leakproof?
Usual Pant Size
6,469 reviews
- Rated 4 out of 5 stars8 hours agoChanged?
I like these but I feel like cut of this last order is different than the last ones I got. Like there is less material on the sides and rise seems a lot lower in front.
KDKyra D.Verified BuyerReviewingLight Leakproof No-Show Bikini 3-Pack - Rated 3 out of 5 stars9 hours agoPerfect thickness, small in back
Love the feel of these, super soft and thin and low waist. However they aren't big enough around the butt, and continue to ride up during any movement. I would absolutely purchase more, amd recommend - if they could make a little more coverage on the back!
MKMary K.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars13 hours agoLove!
These people underwear have changed my life. I now have confidence that if I should have a little incontinence, I am covered! My anxiety is gone. And they are really cute and fit perfectly!
ALAnn L.Verified BuyerReviewingLight Leakproof No-Show Bikini 3-Pack - Rated 5 out of 5 starsYesterdayReally nice underwear
Very comfortable. Love the color.
PFPamela F.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars2 days agoBest Peace of Mind 💖
I loved these so much I switched all my underwear over to the knix line ☺️ After two children you never know when a sneeze or a hard laugh is going to cause a leak, these give daily peace of mind for the days when not so heavy protection is needed.
JSJenna S.Verified BuyerReviewingLight Leakproof No-Show Bikini Kit* - Rated 5 out of 5 stars3 days agoAlways great!
Love the light leakproof as they provide just enough safety in the event of an unwanted dribble.
TCTamara C.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 2 out of 5 stars3 days agoSizing not accurate anymore
Sadly my favorite underwear no longer fit the same. I was excited about the recent sale to add to my collection. Quickly placed an order for three of their three pack “surprise” colors, got them in, washed them all, went on a trip. Since I’ve worn the same size and style for years and my weight is the same I never dreamed they would not fit the same. Put a pair of the new ones on and they barely stretched to get them in and felt like I was wearing constrictive underwear cutting off circulation on my legs. Luckily, I always pack extra and have my older ones with me to wear. Sadly, I’m not able to return any or have this issue resolved.
ELElizabeth L.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars3 days ago5 Stars
Good quality and comfortable!
VVivianReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars3 days agoVery Comfortable
Love these ones. The fit is true to what the sizing guide says. The absorbency is amazing and they are so comfortable
ECElissa C.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 2 out of 5 stars6 days agoKnox parties
Did not care for them. Will be returning.
DPDiana P.Verified BuyerReviewingLight Leakproof No-Show Bikini 3-Pack - Rated 5 out of 5 stars6 days agolasted me 8 years
I bought a few pairs of these when I first got my period at 12, I am now 19 and I am just ready to replace them! They've lasted longer than any underwear and have been used every single period! They're definitely beat up now, but boy did I get my use out of them!
KKnix6 days agoHey Izzy!
8 years - wow! We're so happy our Light Leakproof No-Show Bikini has been your trusted companion through all those years. That's amazing durability!
Team Knix
IIzzyVerified ReviewerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars1 week agoSoft kiss.
I got my 4 sets of bikini light proof no show.
I tried it for the first time and I love it. It feels so soft, comfortable to wear and keep me dry all day.
Will be getting more for sure! .
KKnix1 week agoHey Oluwakemi!
This made our day! We're so thrilled you're loving the soft comfort and all-day protection of our Light Leakproof No-Show Bikini!
Team Knix
OAOluwakemi A.Verified BuyerReviewingLight Leakproof No-Show Bikini
