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ACOTAR™ x Knix

Super Leakproof® Dream Boxer™

$48.00 USD

Buy 3+ Save 15%, Buy 5+ Save 20%

Limited-edition ACOTAR™ x Knix collection

Absorbs about 7-8 super tampons

Optimal overnight protection

Machine washable

Text on Image: No leaks to interrupt sleep. No more stained sheets. Super soft, pajama-style fit

Color: Ember Fox Limited Edition

Size:

Relaxed Fit

•

Size:

Size and Fit Guide

Which COURT are you? TAKE THE QUIZ

Build Your 3-Pack

Super Leakproof® Dream Boxer™

Color: Ember Fox Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Ember Fox Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Ember Fox Limited Edition

Size:

Size:

Get It Before It's Gone

ACOTAR™ x Knix

Get It Before It's Gone

This limited-edition ACOTAR™ x Knix collection brings the Courts, characters, and defining moments of A Court of Thorns and Roses™ to life through original silhouettes and exclusive prints across lingerie, sleepwear, and Knix’s signature leakproof underwear. Shop the Collection

Return Policies

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 48 Points

Part of the limited-edition ACOTAR™ x Knix Collection

Our best-selling overnight period protection in an exclusive ACOTAR™ print.

Inspired by the Autumn Court and Lucien’s fox mask, a flame-tailed fox moves through falling leaves in a display of fire and motion. Bold and energetic, this print reflects a court defined by heat, instinct, and transformation.

Comfort-First Fit

Combining a loose-fitting boxer with an internal brief for discreet Leakproof protection. Designed to be worn as both loungewear and overnight protection.

Worry-Free Protection

Designed with a built-in leakproof liner that fits snug to the body, it helps lock in leaks from every angle, even as you toss and turn.

Heavy Absorbency

Absorbs up to 8 super tampons. Great for heavy flow days, overnight protection, and light bladder leaks.

Easy to Wash

Machine washable, just like your regular underwear.

ACOTAR™ is a trademark of Fireheart Inc. ©2015-2026, Sarah J. Maas.

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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
ACOTAR™ x KNIX

Choose your Court. Choose your fantasy.

Explore the limited-edition collection of intimates, sleepwear, and apparel inspired by the characters who rule the realm.

The Night Court

Starry skies. Unforgettable Nights. Made for deep bonds and a little...spice.
Shop the Collection

4.6
Rated 4.6 out of 5 stars
Based on 573 reviews
88%would recommend these products
FitRated 0.2 on a scale of minus 2 to 2
ComfortRated 4.7 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
Keywords
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Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
573 reviews
  • Rated 5 out of 5 stars
    3 minutes ago
    So comfy!

    These are the most comfortable underwear, even more so than most of my regular pairs. It’s made me almost excited to have my period so I can be comfortable all day.

    EW
    Erin W.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    15 hours ago
    I wish I discovered these sooner!

    I was a bit hesitant for several reasons. I was worried if they really would work as described and have no leakage and I was also quite worried about putting them in the washing machine and whether any damage would be done or staining of other items. I did plenty of research and at first started slow by buying one daytime pair and one nighttime pair just to test effectiveness, comfort, etc. I loved them. No more worrying if I have a tampon in my purse or whether it is the right absorbency for what I need. I track my cycle and know what days I need to wear these. I’m also very impressed with how absorbent they are and how many tampon equivalent amounts they can hold. This allows me to sleep through the night or not have to step out of work worried my tampon may have leaked. I will say they are a bit pricey if you plan to buy everything you would need for a whole week’s menstruation, but I would say I purchased enough nighttime and daytime styles over the course of two cycles by using bundling or discount codes, etc. and now I no longer need to purchase any products from the pharmacy or find out that I’ve run out of product exactly when I need it. I know these will always be in my drawer and I’m very happy that I have them. I wish these were around when I was a teen because this must be so convenient for them as well as providing added confidence that they are well protected. I just wish I bought these sooner!

    JC
    Jennifer C.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™ Kit*
  • Rated 5 out of 5 stars
    16 hours ago
    Perfect

    Incredibly comfortable, just what you want while on your cycle. They don’t feel like they will leak, and don’t squeeze too tight.

    BH
    Brittany H.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    Yesterday
    Love them!

    I really enjoyed wearing these, they’re so comfortable and absorbent if that’s what you’re looking for.

    TS
    Tay S.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    Yesterday
    Great product!

    Work great and are super comfy!!

    MG
    Mackenzie G.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    2 days ago
    Love these!

    Love these. Super comfy!

    SF
    Sara F.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 2 out of 5 stars
    3 days ago
    Not comfortable

    They are made well but not made for fuller hips and big thighs. I had to get up during the night because leg holes and butt ares too small. Cutting into my skin. Very disappointed. Usually wear 3x and ordered 4x but didn’t fit well. If you have a big butt and big legs these may not fit you well. I toss and turn while sleeping

    LS
    Linda S.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    4 days ago
    Very comfortable!

    I like the way these look and feel. For me, they’re best for nighttime or under a skirt or dress. I prefer the dream shorts for under jeans or other pants since they fit much closer.

    LV
    Lois V.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    6 days ago
    5 Stars

    Provides the max night time protection I need. Thank you.

    P
    Patricia
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    1 week ago
    So comfy!!

    I’m 10 weeks post partum. My period is just returning and I wanted to be comfortable and not worry about changing a pad/tampon at night. These are 10/10

    AG
    Alexis G.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™ Kit*
  • Rated 5 out of 5 stars
    1 week ago
    Best thing for sleep 😴

    Love these. Comfy and works perfectly.

    CB
    Corrine B.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
  • Rated 5 out of 5 stars
    1 week ago
    Great fit, super comfortable, only one downfall

    These are my new favorites after being a long time Knix girly for my periods. I sized up a bit to make sure the boxers fit well on my thighs. I love them!

    Only downfall, which is not against the item since it's as described, but I wish these came in the Super Leakproof Plus where the gusset was all the way up the back. As an active sleeper, that would make these a 15/10 for me. I have the Super Leakproof Plus shorts and prefer these for sure!

    BM
    Brittany M. B.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™

Your ACOTAR™ x Knix questions, answered.