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SuperPlus Leakproof® No-Show Bikini

$36.00 CAD

Mix, Match & Save: 3+ for $33 each
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Absorbs 7-11 super tampons

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Front-to-back liner

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Bonded seams prevent leaks

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Machine washable

Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

| Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

| General

Megan has 36.5” hips and wears KNIX S

Color: Twilight Navy Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*

Build Your 3-Pack

Megan has 36.5” hips and wears KNIX S | Twilight Navy

SuperPlus Leakproof® No-Show Bikini

Color: Twilight Navy Limited Edition

Size:

Size:

Megan has 36.5” hips and wears KNIX S | Twilight Navy

SuperPlus Leakproof® No-Show Bikini

Color: Twilight Navy Limited Edition

Size:

Size:

Megan has 36.5” hips and wears KNIX S | Twilight Navy

SuperPlus Leakproof® No-Show Bikini

Color: Twilight Navy Limited Edition

Size:

Size:

Free Shipping on orders $100+

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Shipping

Processing Timelines

Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.

Delivery Time

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

Shipping Charges

Orders over $100* CAD = Free Shipping (2-6 business days)

Orders under $100* CAD = $12 CAD Shipping (1-3 business days)

Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.

*After discounts, before shipping and taxes.

Easy Exchanges within 30 Days

Returns

Returns

Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.

Rewards Members Earn 36 Points

Product Description

The most absorbent invisible period panty ever made. The Knix SuperPlus Leakproof No-Show Bikini is engineered for your heaviest days, absorbing an incredible 7 to 11 super tampons’ worth of flow. Despite its massive capacity, the seamless, raw-cut edges ensure it stays completely invisible under your tightest leggings or skirts. Featuring an extra-long gusset for 360-degree security, it’s the best high-absorbency no-show underwear for those who need maximum protection without the bulk.

Comfort-First Fit

Classic mid-rise bikini silhouette with medium coverage for hips and bum.

Ultimate Leakproof Protection

Our longest, most absorbent liner ever—front-to-back coverage without the bulk.

Day & Night Comfort

Buttery-soft stretch fabric moves with you, while bonded seams keep leaks contained and create a smooth, seamless look under clothing.

Machine Washable

Wash just like your regular underwear—easy, everyday care.

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Megan has 36.5” hips and wears KNIX S | Twilight Navy
| Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy
| General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups
PATENTED LEAKPROOF TECHNOLOGY

Our longest, most absorbent liner—ever.

Our original Fresh Fix Technology® features a built-in absorbent liner that soaks up about 7–11 super tampons’ worth of liquid—so you stay fresh, comfortable, and in control.

Soft Top Layer

Soft Top Layer

Gently wicks moisture away while keeping you feeling fresh and odor-free.

4.7
Rated 4.7 out of 5 stars
Based on 26 reviews
Total 5 star reviews: 23 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 2
92%would recommend this product
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated -0.0 on a scale of minus 2 to 2
Ease of UseRated 4.8 on a scale of 1 to 5
26 reviews
  • Rated 5 out of 5 stars
    3 minutes ago
    Great fit and comfort

    They work well for bladder issue. I would like to get several more

    Tony H.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 days ago
    Honestly life changing

    I bought these "off brand" and as a last hope. You see, I was 20+ weeks pregnant and suffering from very painful vulvular varicosity. It was difficult to walk at the end of the day the pain was so bad. The "devices" meant to treat this condition are not only expensive, but very impractical for someone using the bathroom every hour (lots of velcro). I knew I needed support and I was hoping Knix would provide enough to make the remainder of my pregnancy bearable. I figured even if they didn't work, I would be able to use them postpartum and beyond so I took a chance. I am so glad I did. My daily quality of life has improved so much. I am no longer in pain and it is all thanks to Knix. I am so happy with my outcome I have passed the information onto my OBGYN in hopes that these can help other women in my situation.

    Megan B.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Comfortable and confident

    Super comfortable and cute, I love this as my period wear and they make me feel confident about not leaking throughout the day or night. They are also not as bulky as other period underwear I have tried which is also so nice to not feel like you are wearing a diaper that can be seen sticking out of your pants.

    Kally P.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Leakproof

    Excellent product

    Susan S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Best way to feel confident

    Comfortable fit, stays in place and stops embarrassing leaks

    Victoria R.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Super plus

    Wonderful product.

    Paige B.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    5 Stars

    Comfortable fit

    Corry
  • Rated 5 out of 5 stars
    3 weeks ago
    Awesome

    Love them !!!

    Marie-Eve P.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Love my Leakproofs

    I really like them. They aren't bulky and the fabric is very silky.

    Susan A.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great garments

    Happy I purchased!

    Sheila M.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Very comfortable

    Very comfortable and easy to wear and clean. Felt confident while on my period.

    Carrie E.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great fit

    Love there! Had been wearing a MED and didnt quite feel comfortable in regard to coverage. Went with the large and felt better and more comfortable in be covered should anything happen.

    Desiree K.
    Verified Buyer