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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
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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.
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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 1 regular tampon worth of liquid so you feel fresh and in-control.
Soft Top Layer
Middle Layer
Leakproof Layer
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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: 889 Total 3 star reviews: 360 Total 2 star reviews: 192 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
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How do you use your Leakproof?
Usual Pant Size
6,457 reviews
- Rated 5 out of 5 starsYesterdayThe go-to
These are great. Perform as I expect. I haven’t tested them with the full tampon amount they are for, but that’s a personal preference, I haven’t had any issues for my needs.
KKnixYesterdayHey Cristine!
Thanks so much for taking the time to review our Light Leakproof No-Show Bikini! We're so happy to hear they're performing perfectly for your needs!
Team Knix
Cristine C.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 3 out of 5 stars4 days agoNot for me
I am 77 yrs old. This was my free bday gift. I haven’t worn bikini panties for many yrs. It would be nice to have a choice as my bday gift. I will be giving these to my granddaughter.
KKnix4 days agoHey Ann!
Thanks so much for the review! We're sure your granddaughter will love them. Hope you find something that's a perfect fit for you!
Team Knix
Ann B.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars6 days agoFantastic pair of undies for a light day
I wear these on the last day when Im primarily concerned about breakthrough bleeding- no leaks and look great with a pair of leggings
KKnix6 days agoHey Karen!
Thanks so much for the amazing review! We're so happy our Light Leakproof No-Show Bikini is keeping you confident and comfortable on those lighter days.
Team Knix
Karen B.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 1 out of 5 stars1 week ago91 year old lady
I ordered 4 pair of leakproof panties. after one laundry the inner portion of one came apart. Poor workmanship!
Lorene S.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars1 week agoPerfection
My daughter loves knix. They are comfortable, not bulky and keep her confident.
KKnix1 week agoHey Erin!
This is so wonderful to hear! We're thrilled our Light Leakproof No-Show Bikini is keeping your daughter comfortable and confident. That means everything to us!
Team Knix
Erin D.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars1 week agoDry knix
Perfection, works like a charm! I have been searching for dry wicking underwear as a backpacker, I was able to test while backpacking and Knox did not let me down!
KKnix1 week agoHey Richalina!
This is amazing! We're so happy our Light Leakproof No-Show Bikini kept you dry and comfortable during your backpacking adventures. Thanks for taking us along on your journey!
Team Knix
Richalina H.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars1 week agoComfy
I love these underwear, there smooth and so comfortable. Plus im reasured if I do have an unexpected "visitor" that im protected!
KKnix1 week agoHey Tanya!
Thanks so much for taking the time to review our Light Leakproof No-Show Bikini 3-Pack! We're so happy to hear you're loving the comfort and peace of mind!
Team Knix
Tanya M.Verified BuyerReviewingLight Leakproof No-Show Bikini 3-Pack - Rated 5 out of 5 stars1 week agoRo
Love them
KKnix1 week agoHey Christie!
Love this! We're so happy to hear you're loving your Light Leakproof No-Show Bikini. Thanks for the amazing review!
Team Knix
Christie M.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 4 out of 5 stars1 week agowould buy again!
should have got a bigger size but will buy more!
KKnix1 week agoHey April!
Thanks so much for the 4-star review! We're so happy to hear you'll be buying more Light Leakproof No-Show Bikinis. Love the enthusiasm!
Team Knix
april r.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars1 week ago5 Stars
Great fit and colors!
KatrinaReviewingLight Leakproof No-Show Bikini 3-Pack - Last Call - Rated 5 out of 5 stars1 week agoVery comfy
Super happy with this!
KKnix1 week agoHey Barbara!
Thanks so much for taking the time to review our Light Leakproof No-Show Bikini! We're so happy to hear you're loving the comfort!
Team Knix
Barbara O.Verified BuyerReviewingLight Leakproof No-Show Bikini - Rated 5 out of 5 stars2 weeks agoLove it!
The lightweights were a game changer for my wardrobe. Have been a longtime customer & started with the super, but lightweights are great for light days & great for sweat control during the summer. So comfortably thin, they feel like normal underwear.
KKnix2 weeks agoHey Brianna!
This is amazing! We're so happy the lightweights have been such a game changer for your wardrobe. Thanks for being such a loyal customer!
Team Knix
Brianna S.Verified BuyerReviewingLight Leakproof No-Show Bikini
