Luxe Modal Leakproof Sleep Boxer
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
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.
• High rise silhouette
• Extra hip & bum coverage
• Absorbs about 3 regular tampons’ worth of period blood
• Quick dry, odor reducing gusset
• Lightweight, naturally breathable, super soft modal fabric
• Non-digging shadow-sheer waistband
🇺🇸 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.
Our Absorbency Guide
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.
- Pearl6 minutes agoRated 5 out of 5 stars5 Stars
The comfort & I really like the soft material. Great product!
Was this helpful? - Stephanie D.Verified Buyer2 days agoRated 5 out of 5 starsThey work!
These are very comfortable and no leaks!
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? - TeresaVerified Buyer1 month 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?