Skip to content Accessibility Statement

Your Bag

Your cart is empty

But you're full of potential..

Create an account to join Club Knix and earn points on this order
Best Seller

SuperPlus Leakproof® No-Show High Rise

$39.00 CAD

Absorbs 7-11 super tampons

Front-to-back liner

Bonded seams prevent leaks

Machine washable

Front view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

Ashley has 39” hips and wears KNIX S

SuperPlus Leakproof® No-Show High Rise shown front-facing against a light gray background
Back view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

Ashley has 39” hips and wears KNIX S

Full-body view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

Ashley has 39” hips and wears KNIX S

On image text: Ultra-thin, front-to-back liner. Bonded edges prevent side leaks.

Ashley has 39” hips and wears KNIX S

Color: Dark Cherry

Size:

True to Size

Size:

Size and Fit Guide

Build Your 3-Pack

Front view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

SuperPlus Leakproof® No-Show High Rise

Color: Dark Cherry

Size:

Size:

Front view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

SuperPlus Leakproof® No-Show High Rise

Color: Dark Cherry

Size:

Size:

Front view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit

SuperPlus Leakproof® No-Show High Rise

Color: Dark Cherry

Size:

Size:

Rewards Members Earn 39 Points

Comfort-First Fit

High-rise silhouette sits at your natural waist and offers medium coverage for the bum, combining comfort with a flattering fit.

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.

Zoom

Ashley has 39” hips and wears KNIX S | Front view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit | Dark Cherry
Ashley has 39” hips and wears KNIX S | Back view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit | Dark Cherry
Ashley has 39” hips and wears KNIX S | Full-body view of model wearing the SuperPlus Leakproof® No-Show High Rise highlighting the coverage and smooth fit | Dark Cherry

How to Choose?

Essential

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

  • 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

  • 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

  • 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

★★★★★ Everyone's switching to Knix Leakproof

151K SuperPlus pairs sold. And counting...

Shop Now
★★★★★ I don't worry about leakage with these - they are GREAT!!!

— Carol F.

★★★★★ This product has absolutely changed the game when it comes to period products..I am SO happy I made the switch. Comfortable, extremely absorbent..

— Mariah S.

★★★★★ Would totally recommend these. They fit well and do their job on heavy days. A must have.

— Jennifer N.

DAY & NIGHT COMFORT

SuperPlus Leakproof® High Rise

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

GET THEM BEFORE THEY'RE GONE

Not sure which absorbency is right for you?

4.2
Rated 4.2 out of 5 stars
Based on 327 reviews
Reviews Summary
Customers say these underwear are comfortable and provide reliable protection. Many praise the full front and back coverage, with frequent comments highlighting their effectiveness for overnight wear and heavy flow. Users appreciate the no-show design under clothing and soft fabric. Common concerns include fit issues around the thigh and leg openings, with some noting the underwear rides up or gaps. A few mention the material feels thicker than expected, and some report leakage despite the protective design. Overall, customers find them a practical alternative to traditional products.
77%would recommend these products
ComfortRated 4.2 on a scale of 1 to 5
EffectivenessRated 4.3 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
Keywords
Keywords
Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
327 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    Fit perfectly !

    I've been a customer for at least 15 years. I wasn't expecting more coverage but it makes me feel comfortable. These are the only undergarments I'll ever wear.

    TC
    Thais C.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Black with White Polka Dot / XL
  • Rated 5 out of 5 stars
    2 days ago
    Leakproof

    Awesome they do not leak at all. Worth every penny.

    VL
    Vicki L. H.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise
  • Rated 5 out of 5 stars
    3 days ago
    Knix

    Love all my Knix! I have tried other brands and there is no comparison!

    WS
    Wendy S.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Black / XL
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    These are a lifesaver for me.

    S
    Sonia
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Black with White Polka Dot / XL
  • Rated 5 out of 5 stars
    1 week ago
    Great Leakproof Underwear

    I love the full coverage backing on these, they're great got my heavier days and for overnight! They don't feel bulky like pads do, more similar to wearing two thicker pairs of underwear. The fabric texture is like a mix between a swimsuit and seamless underwear. They're a bit of an investment but I will definitely be buying more! They're a bit tight in the waste band so I'd recommend maybe sizing up if you don't want the compression from it but aside from that they fit true to size!

    KL
    Katelyn L.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise
  • Rated 5 out of 5 stars
    1 week ago
    Love them!

    I bought large the first time and they were too big. Ordered medium and they are perfect.

    VS
    VICKI S.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Dark Cherry / M
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    I love them. I bought some from Costco before and after use them I'm looking for more from this brand. They are impressing me and useful.

    This pattern is so cute.

    B
    Bulan
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Black with White Polka Dot / M
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    I love them. I bought some from Costco before and after use them I'm looking for more from this brand. They are impressing me and useful.

    B
    Bulan
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Black / M
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    I bought 6 knix from Costcoand they are very useful, convenient and comfortable for me.

    So I'm looking to find more from the brand.

    I'm very trust in this product because I use the daily life style already and they are impressing me. I love them.

    B
    Bulan
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Twilight Navy / M
  • Rated 5 out of 5 stars
    2 weeks ago
    Super plus leakproof no show high rise

    Excellent

    JS
    Janice S.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise
  • Rated 5 out of 5 stars
    2 weeks ago
    Excellent coverage and very comfortable

    Sometimes, as women age, we laugh and pee ourselve a little and it's not that funny. This underwear offers the most comfortable and affordable (think of the savings on disposable pads!) coverage while also wicking away sweat from excess chub rub. Definitely a Knix-convert for life now.

    TU
    Tasneem U.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Warm Sand / XL
  • Rated 5 out of 5 stars
    2 weeks ago
    Comfort

    Had some long days of travel and they were comfortable and relieved the stress of “coming up short”.

    MJ
    Mary J. C.
    Verified Buyer
    Reviewing
    SuperPlus Leakproof® No-Show High Rise Warm Sand / XXL

Your underwear questions, answered.

151K+ made the switch