Super Leakproof® No-Show Underwear Bikini - Clearance

the power of 8 tampons or pads, without all the bathroom breaks.
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Nothing is TMI here—we promise.
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Last Call Sale items are exchange only meaning you may exchange for another item or store credit. No refunds can be accommodated.All sale items are not eligible for our First Pair Risk-Free Policy.

Heavy Absorbency

Absorbs about the same as 3 super tampons. Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.


Medium Absorbency

Absorbs about 2.5 super tampons' worth of blood. Ideal for medium period days, discharge and sweat.


Lightest Absorbency

Absorbs about the same as about 1 regular tampon worth of blood, sweat or discharge. Ideal for lightest period days, spotting, sweat and discharge.

All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in. Liner’s are discreet and comfortable, and fit for your teen’s unique flow. 

That’s up to your teen or tween! Every flow and comfort level is different.

Depending on the absorbency level of the period underwear and the heaviness of your teen’s flow, they can wear our period undies on their own or as a backup to tampons or menstrual cups. 

We always recommend they choose an option that makes them feel most confident!

Step 1: Give your underwear a quick rinse under cold water.
Step 2: Throw it in the washing machine with your regular clothes. Wash on cold with mild detergent (no softener or bleach).
Step 3: There are two ways to dry them depending on the undies you have: lay flat to dry for medium absorbency products, or tumble dry on low for high to super absorbency products.
Step 4: That’s it! No ironing needed.

Check out our size chart here. If you want some help, we have virtual fitters ready on deck to help you find your perfect fit. Book a video call with them today.

Reviews
average rating 4.8 out of 5
Based on 548 reviews
  • 5 Stars
    460 Reviews
  • 4 Stars
    64 Reviews
  • 3 Stars
    8 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    8 Reviews
97% of reviewers would recommend this product to a friend
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 4 out of 5
Review posted
Reviewed by April C.
Verified Buyer
Pant Size
Kids 8-10
Size Purchased
XS
Usage
  • Period
  • Back-up Protection
Rated 5 out of 5

Great panty

Out of all the various brands, my 11 year old loves these period panties. She loves the style, the feel and that they are comfortable. I will definitely be purchasing more.

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I recommend this product
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 5 out of 5
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Review posted
Reviewed by Chanda M.
Verified Buyer
Rated 5 out of 5

Work great

My daughter has sensory issues and is in the spectrum. She loves the Knixteen products. They're comfy, no itchy seams, and they work!!! We've been using them for over two years now with absolutely no issues. I definitely recommend their products

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Review posted
Reviewed by Nancy B.
Verified Buyer
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 12-14
Size Purchased
S
Usage
  • Period
Rated 5 out of 5

Underwear

Best thing I have could had bought for my daugther who just starter to have her period.

She prefer using Knix then the regular pads. I got a subvention from my city to pay part of the price of the underwear.

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I recommend this product
Quality
Rated 4 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 4 out of 5
Was this helpful?
Review posted
Reviewed by Ly N.
Verified Buyer
Pant Size
Kids 12-14
Size Purchased
XS
Usage
  • Back-up Protection
  • Other
Rated 5 out of 5

Comfortable!

My daughter is anticipating her first period so I bought these to lessen her anxiety. She has been wearing them every day and says they are comfortable. She is 100 lbs and petite, I purchased an XS.

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I recommend this product
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 5 out of 5
Was this helpful?
Review posted
Reviewed by Erin C.
Verified Buyer
Pant Size
Teen 00-2
Size Purchased
M
Usage
  • Back-up Protection
  • Period
Rated 5 out of 5

Great product but size up

My daughter is a big fan and especially appreciates how thin these are compared to other brands. They do run small. She usually wears SM but I ordered M based on other reviews.

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I recommend this product
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated -2 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 5 out of 5
Was this helpful?