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Sale

Leakproof Logo Modal Rib Boxer Brief - Last Call

$24.50 USD

$35.00

30% off

Absorbs about 1 regular tampon

Ultra-soft ribbed modal

Perfect for daily wear

Machine washable

Esther has 38

Esther has 38" hips and wears KNIX M

| Grey
Esther has 38

Esther has 38" hips and wears KNIX M

Esther has 38

Esther has 38" hips and wears KNIX M

| General
| General
| General

Esther has 38" hips and wears KNIX M

Color: Grey

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.

Last Call Return Policy

Sale & Last Call

Our Sale Policy

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

  • Items discounted up to 30% 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 24 Points

Product Description

Easy-to-wear underwear meets a new, must-have look. Soft modal spandex in a boxer-style silhouette with signature Knix logo waistband—in other words— these are your next favorite pair. Featuring our built-in leakproof technology so that you can use them as backup period protection or on their own on lighter days.

Comfort-First Fit

This boxer style sits at the natural waistline with full bum coverage.

Worry-Free Protection

Our original leakproof technology offers a barely there feel while patented bonded edges help prevent side leaks.

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.

Easy to Wash

Machine washable just like regular underwear.

Zoom

Esther has 38
| Grey
Esther has 38
Esther has 38
| General
| General
| General

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
4.1
Rated 4.1 out of 5 stars
Based on 155 reviews
Total 5 star reviews: 97 Total 4 star reviews: 20 Total 3 star reviews: 14 Total 2 star reviews: 6 Total 1 star reviews: 18
What our customers are saying
Customers say these boxer briefs are incredibly soft and comfortable, with many praising the modal fabric as breathable and gentle. Users frequently mention they're perfect for sleeping, lounging, and light flow days. Many reviews highlight the comfort level, with some calling them the most comfortable underwear they've worn. Common feedback includes concerns about the waistband being tight or cutting in, with several recommending sizing up. Some find the back seams uncomfortable and note the leakproof panel can feel bulky or diaper-like. Reviews are mixed on fit, with some experiencing bagginess while others appreciate the true-to-size fit. Many mention these work well for overnight protection and light absorbency needs.
75%would recommend this product
FitRated 0.1 on a scale of minus 2 to 2
ComfortRated 4.1 on a scale of 1 to 5
EffectivenessRated 4.1 on a scale of 1 to 5
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155 reviews
  • Rated 5 out of 5 stars
    10 hours ago
    Modal boxer brief

    So soft and comfortable. Perfect for sleep. Could also wear it during the day as its not bulky at all.

    Hallie S.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 3 out of 5 stars
    12 hours ago
    Not my style, came in a set at a great price.

    More leakproof than I need. Maybe good for overnight. Material is nice.

    Catherine F.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 5 out of 5 stars
    3 weeks ago
    Underwear

    My austim daughter loves thus kind of underwear she won’t use any other one thank you 😊

    Lisa c.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 5 out of 5 stars
    3 weeks ago
    My Favorite

    This style is my go-to for spotting and light flow days. They are even breathable enough to wear as regular undies, which I do frequently because they're so comfy!

    Emily B.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 3 out of 5 stars
    1 month ago
    "Bum" Coverage

    I took a chance on this style but (pun?) coverage with leakproof material covering my butt is a bit uncomfortable. I really like the modal fabric and wish my original purchase of boy cut in smooth modal fabric was still available. Having lost weight I need a smaller size. I'll now be on a mission to find a better replacement than the ribbed modal.

    Patricia B.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 1 out of 5 stars
    1 month ago
    Awful

    Although I like the idea of true cotton these briefs were horrible. I’ve been using nothing but Knox for almost 10 yrs. The material is thin, the ribs are uncomfortable, the waistband cut into the waist yet support and overall fit was baggy. A bad cheap product. No femininity at all. I felt like I had my brother’s underwear on … YUCK !

    Teresa Y.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 4 out of 5 stars
    1 month ago
    Comfy

    I’d love these with more absorbency!

    Lane
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 5 out of 5 stars
    2 months ago
    5 Stars

    Will be ordering more. Love these.

    Zlata
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 2 out of 5 stars
    2 months ago
    Not worth the money

    This was the second style of Knix undies I’ve tried & unfortunately I haven’t loved this brand. I only use period undies as backup protection when I have my cup in. I first tried their no-show undies, and after only a few months of wearing them they had stretched out to the point of not staying in place. I went with the size chart & they fit fine on my first few wears. I thought I would try a different style to see if it was a better option. The boxers feel like you’re wearing a diaper. They’re still supposed to be light absorbency, but they are so uncomfortable because of the thick seams in the back. With how expensive these undies can be, I’m disappointed & I wish I wouldn’t have wasted money on them.

    Molly
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 4 out of 5 stars
    3 months ago
    Comfy minus the waistband

    These are my first pair of these (I usually buy the Dream Short) & while I love the fabric & overall fit, I wish the waistband was wider & note there is a stark difference in stretch between the overall fabric & the built in pad that makes these feel a bit more “diaper-y” than other Knix undies. I’ve been able to use them on moderate flow days/nights so I’m happy with the capacity. I’ll still enjoy them, but not as much as some of the others.

    Allison
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 5 out of 5 stars
    3 months ago
    Very comfortable for warm weather!

    Fit is great, absorption could be improved at the edges.

    Thank you for one of the best products out there

    Deb C.
    Verified Buyer
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call
  • Rated 1 out of 5 stars
    3 months ago
    Poor substitute for Model Boxer

    These replaced the well fitting and comfortable Modal boxers. Not all women have a short waist.

    Terri C.
    Reviewing
    Leakproof Logo Modal Rib Boxer Brief - Last Call

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