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Underwear By Absorbency
Light
Drop
Drop
Drop
Drop
Drop

Absorbs 1-3 regular tampons
Moderate
Drop
Drop
Drop
Drop
Drop

Absorbs 2-4 super tampons
Heavy
Drop
Drop
Drop
Drop
Drop

Absorbs 4-7 super tampons
Leakproof Explained
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5 Reasons to Wear Leakproof
Sleepover Short
Sleepover Boxer
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| Night Sky/Beige/Black

Absorbency: Heavy

Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons
Moderate
Drop
Drop
Drop
Drop
Drop
about 2-4 super tampons
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons

Color: Night Sky/Beige/Black Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
FREE Shipping on orders $70+

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.

Delivery Timelines

For the most up to date delivery time estimates, please refer to the shipping timeline at checkout. 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.

US Orders

Orders within the United States will be shipped with DHL and USPS or FedEx based on your address and carrier availability.

Please note: Orders over $700 may be subject to customs/duties upon receipt. Customers are responsible for any customs/ duties upon receipt of order. Orders are shipped from Canada.

Standard US shipping is free on eligible orders over $70 USD*. Orders under $70 USD are $10 USD for standard shipping depending on location.

*After discounts, before shipping and taxesWe 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.
Return Policy

Return Policy

Return Policy

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

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| Night Sky/Beige/Black

How to Choose?

Heavy

Drop
Drop
Drop
Drop
Drop
  • • Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.
  • 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
  • • Ideal for lightest period days, spotting, sweat and discharge.
  • 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
  • • Ideal for medium period days, discharge and sweat.
  • 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 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

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4.7
Rated 4.7 out of 5 stars
Based on 13 reviews
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13 reviews
  • Rated 4 out of 5 stars
    1 month ago
    Pretty Good!

    Sometimes leaks in the sides because there are no wings and the pad doesn’t go all the way to the sides but super comfy and cute designs / colors

    Alexandra K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 months ago
    Amazing!

    These are a total game changer!

    Shaley R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 months ago
    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.

    Nancy B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 months ago
    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.

    Ly N.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    7 months ago
    Not enough coverage.

    These are not bad. I got them for my teen and they leaked the first time she used them, in the back and out the side. Would be great if there was more coverage to see how they hold up.

    Rachel K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    7 months ago
    Perfect overnight wear for teen!

    I ordered these and some on Amazon because I was in a pinch. Wow, you can tell a huge difference between the two. Knix nailed quality and comfort, along with durability and design for my teenager. Thank you!!

    Alissa C.
    Verified Buyer
    Was this helpful?