Luxe Modal Leakproof Sleep Boxer
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
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Luxe Modal Leakproof Sleep Boxer
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
Designed with a cloud-soft modal fabric blend and shadow-sheer waistband detailing, this Leakproof Sleep Boxer lets you rest easy without worry of leaks.
🇺🇸 Free standard shipping over $100*.
Free expedited shipping over $150*. Duty-free. (after discounts, before shipping + taxes)
Within 30 days of delivery, you may exchange for another size, style or store credit. We’re unable to provide refunds on underwear.
- TeresaVerified Buyer4 minutes agoRated 5 out of 5 starsModal fabric is the best!
I'm absolutely in love with these. I wear them day and night for my LBL. The modal fabric is by far the best for me as I don't find them hot. They are super soft and fit like a glove. (I was on the borderline for sizing so I sized down and they fit perfectly.) The protection is perfect for my LBL and they don't feel bulky. They feel like regular underwear in terms of gusset comfort. I only wish they were a couple inches shorter so I can wear them under my bermuda shorts in the summer. I'll continue to buy modal fabric. I now have 8 pairs! (I also love the cotton modal high rise underwear. I hope they bring them back as they are currently out of stock.)
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentEase of Use Rated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - HYesterdayRated 5 out of 5 starsSo comfortable
I wasn’t sure about the insert and how it looked but you really can’t see it and dang, these are comfortable. Make them non-leakproof for the rest of the month and in a 3 pack please! I’d wear them every night!
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful? - June M.Verified Buyer4 days agoRated 5 out of 5 starsFinally! Thank you!
I’ve been hoping Knix would create a leakproof sleeping bottom for some time now. I really don’t like having to wear underwear under pajamas and this sleeper boxer is a great product. I just got it yesterday, wore it last night, will wear it again tonight. It fits well and performs even better. I just wish it were a little longer. Please make this product available in capri and pant lengths. I will definitely purchase at least one more boxer but I would buy LOTS of them if they were available in other lengths. Thank you Knix!
ComfortRated 4.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated -2.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful?
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How to wash
Machine Washable: Wash with like colors, cold setting with mild detergent, do not bleach, iron, or dry clean.
Always refer to our Fabric & Care section for best drying practices.
Your leakproof questions, answered.
Our Leakproof technology features a built-in absorbent liner. Depending on the style you choose, the absorbency can range from about 1-17 tsp of liquid. The result? Confident protection from sweat, discharge, periods, and light bladder leaks.
A gusset is essentially a liner. It’s where you’ll find our leakproof technology. It’s built into the crotch section of the underwear.
Coverage at Knix comes in all shapes and sizes. If we’re talking about silhouettes, we go all the way from thongs to boxers.
We also offer high rise styles, like the Leakproof UltraThin No-Show High Rise, that sits just above the natural waist and gives full coverage through the stomach, hip & bum.
For extra liner coverage, look for undies that have an “extra-long liner” (usually 10”-14”), like in our Dream Short. And our Ultra Zones+ also have full bum coverage, too.
Have a suggested style or coverage? Just let us know. We love the feedback!
Many people refer to them as period underwear or period panties. But leakproof underwear covers you for all of life’s leaks, including periods (even your heaviest flows), sweat, light bladder leaks, postpartum, and discharge.