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Flash Sale ⚡️

Leakproof UltraThin No-Show High Rise - Sale

$22.40 USD

$32.00

30-50% off

Absorbs about 2.5 super tampons

Invisible under clothes

Moderate protection without the bulk

Machine washable

Ashley has 39“ hips wearing KNIX S | Indigo

Ashley has 39“ hips wearing KNIX S

Front view of model highlighting the coverage and fit
Ashley has 39“ hips wearing KNIX S | Indigo

Ashley has 39“ hips wearing KNIX S

Ashley has 39“ hips wearing KNIX S | Indigo

Ashley has 39“ hips wearing KNIX S

Ashley has 39“ hips wearing KNIX S

Color: Indigo Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Free Shipping on orders $100+

Shipping

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.

Sale Policy

Sale & Last Call

Our Sale Policy

Here's how returns and exchanges work for sale items.

  • Items discounted 30% or less are eligible for a size exchange or store credit.
  • Items discounted above 30% are final sale. No refunds, store credits, or exchanges.
  • Not sure where your item lands? Chat with us and we'll check for you

Still have questions? View our full policy here.

Rewards Members Earn 22 Points

“Best seamless absorbent underwear"

- Women's Health

Product Description

These underwear feature our buttery soft fabric and offer a full bum and hip coverage, sitting near your belly button. Great for leak protection, the ultra-thin liner absorbs about the same as 2.5 super tampons or 1 regular pad’s worth. Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.

High Rise Silhouette

Sits just above the natural waist. Full coverage through the stomach, hip, and bum.

Moderate Absorbency

Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.

Worry-Free Protection

Perfect for moderate period days, light bladder leaks, and sweat. Moisture-wicking liner keeps you dry and comfortable.

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

Ashley has 39“ hips wearing KNIX S | Indigo
Ashley has 39“ hips wearing KNIX S | Indigo
Ashley has 39“ hips wearing KNIX S | Indigo

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
4.5
Rated 4.5 out of 5 stars
Based on 1,461 reviews
Total 5 star reviews: 1.1k
Total 4 star reviews: 141
Total 3 star reviews: 93
Total 2 star reviews: 41
Total 1 star reviews: 86
What our customers are saying
Customers say these high-rise underwear are extremely comfortable and feel like wearing nothing at all. Many appreciate the smooth, silky fabric that provides confidence for light bladder leaks without the bulk of traditional liners. Users find them breathable, lightweight, and effective at staying in place without rolling down. The high waistband offers tummy support and works well under fitted clothing. However, sizing appears inconsistent, with many noting they run small and recommending ordering a size up. Some mention the waistband sits very high, which isn't preferred by all users. A few report issues with the absorbent area placement or coverage. Overall, customers praise their comfort and effectiveness for everyday wear.
86%would recommend these products
FitRated -0.0 on a scale of minus 2 to 2
ComfortRated 4.5 on a scale of 1 to 5
EffectivenessRated 4.5 on a scale of 1 to 5
Keywords
Keywords
Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
1,461 reviews
  • Rated 5 out of 5 stars
    3 minutes ago
    Great smoothing briefs

    This underwear is a favourite of mine for its smoothing qualities, a good amount of absorption & also the pretty colours it comes in.

    EJ
    Elizabeth J.
    Verified Buyer
    Reviewing
    POS - Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    11 hours ago
    Panties

    I have tried many brands of leakproof panties, but Knix are the best.

    LP
    Louise P.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 1 out of 5 stars
    Yesterday
    INEFFECTIVE

    After years of using another product, I was forced to switch to something new. I spent $138.60 for a worthless set of panties. Yes, they are leak proof if you happen to stay consistently within the guidelines, but one time of an overage and they leak on your pants. Also, the urine keeps the panties wet at the top with no absorbency. Forced to change immediately, as they are damp against your body. Without having any leaks they also smell slightly when using the restroom. I would prefer the older, "bulky" style that absorbed rather than staying completely wet. Fits well, feels great, but ineffectual for its purpose. A waste of $138.60.

    L
    Lynne
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    3 days ago
    Glad I finally tried Knix!

    I’ve been curious about Knix for years. But the expense always held me back. I got a pair recently and love them. They are more comfortable than I expected and they feel high quality. I will be buying more eventually.

    AP
    Angela P.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    3 days ago
    High Rise - black

    Material is lighter

    RS
    Renee S.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise Kit*
  • Rated 5 out of 5 stars
    3 days ago
    Very comfortable fit

    I love the fit, the fabric and the great selection of colours.

    BB
    Brenda B.
    Verified Buyer
    Reviewing
    POS - Leakproof UltraThin No-Show High Rise
  • Rated 2 out of 5 stars
    4 days ago
    Ok but less than advertised

    Ok - not really leakproof. Better than regular panties but overpriced for the value. Price should be reduced substantially.

    GM
    Gail M.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    5 days ago
    Perfect!

    Fits perfectly. Very comfortable.

    HM
    Helene M.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    6 days ago
    Fantastic Knix

    I have now purchased enough pairs of Knix so all my other underwear have been tossed. Truly, Knix are incredible. So thin and silky with a touch of control and leaks aren't a thought! Plus the colors are so soft and enjoyable. Knix makes me feel still feminine at 75. Why spend excessive money on paper products and feel old , when you can truly enjoy your Knix.

    MG
    Maureen G.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise 3-Pack - Last Call
  • Rated 3 out of 5 stars
    1 week ago
    pants have changed

    sized much smaller than in past and fabric is thinner

    JD
    Joan D.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    1 week ago
    Confidence and style

    Have been wearing these for a couple years now and am the confidence they provide makes my days and nights more carefree.

    SL
    Steph L.
    Verified Buyer
    Reviewing
    POS - Leakproof UltraThin No-Show High Rise
  • Rated 5 out of 5 stars
    1 week ago
    Great product

    Great product at a great price. Love the sale!

    CS
    Carol S.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show High Rise 3-Pack - Last Call