Leakproof Cotton Boybrief
Bundle & Save: 3 for $75
Leakproof Cotton Boybrief
Bundle & Save: 3 for $75
Knix period underwear and pads are now sales tax-free in Canada.* We celebrate improvements to the accessibility and affordability of essential period care products.
• Great for daytime protection, the ultra-thin liner absorbs about the same as 3 super tampons or 1.5 regular pads worth of liquid.
• The innovative floating gusset provides leak protection from every angle.
• The cotton-spandex blend feels luxurious against your skin.
• Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX
• Machine washable just like regular underwear.
Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.
• Brief shorts style
• Absorbs the same as about 3 super tampons’ worth of liquid
• Quick dry liner
• Soft, cotton-spandex blend
🇨🇦 Free standard shipping over $100.
(after discounts, before shipping + taxes) All items ship from within Canada.
Within 30 days of delivery, you may exchange for another size, style or store credit. We’re unable to provide refunds on underwear.
Your leakproof questions, answered.
*Offer valid on select underwear styles on knix.com and knix.ca, while supplies last. When you purchase three or more eligible styles from the same category, you’ll receive the corresponding offer:
Light: 3 for $60
Heavy: 3 for $75
Overnight: 3 for $99
Exclusions: Leakproof CoreLove High Rise, Leakproof Modal Rib Boxer Brief, Luxe Modal Leakproof Sleep Boxer, Leakproof Cotton Modal Bikini, Leakproof Cotton Modal High Rise, all Thigh Saver styles and Last Call items.
Discount is automatically applied at checkout and is based on eligible items in your order. No rain checks or price adjustments on previous purchases.
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.
*Period underwear and pads are exempt from federal sales tax in Canada. They are also exempt from most provincial / harmonized sales taxes. But are subject to the following provincial sales tax rates which will apply to orders shipped to the following provinces and to orders purchased in retail stores located in the following provinces: British Columbia and Manitoba: 7% PST; Saskatchewan: 6% PST.
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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.
- Lisa B.Verified BuyerHeight <5’5”Pant Size Purchased XXLUsage Light Bladder LeaksYesterdayHeight <5’5”Pant Size Purchased XXLUsage Light Bladder LeaksRated 5 out of 5 starsBoybrief
very comfortable love them
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 ExcellentWas this helpful? - Amy L.Verified BuyerHeight 5’6 – 5’8”Pant Size 10Pant Size Purchased MUsage Primary Period Protection2 days agoHeight 5’6 – 5’8”Pant Size 10Pant Size Purchased MUsage Primary Period ProtectionRated 5 out of 5 starsComfy
This is my first time trying period undies. I’ve wanted to try them for a while now, and finally took the plunge during the Knix spring sale. Now, it is an adjustment to get used to (especially if you have some heavier days and the laundry!), but I think another cycle and I’ll become a pro. I’ve bought almost every style and worn each one, but this boybrief style on the light to medium flow days/ nights are sooooo comfy. They don’t ride up in pants and I love that they are cotton. I was a little nervous they’d be lower in the waist than I like, but they’re perfect. I wish Knix would make more of their undies in cotton. One thing I also wish they had was the absorbency icon was labeled on the inside of the underwear somewhere. With so many styles it gets confusing which pair works for which days. All part of the learning curve I suppose. If you’re considering the switch, Knix is great! And they’re Canadian 🇨🇦
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 4.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - Krysten H M.Verified BuyerHeight <5’5”Pant Size Purchased MUsage Period Back-Up2 days agoHeight <5’5”Pant Size Purchased MUsage Period Back-UpRated 5 out of 5 starsBoy short
Big fan. Will likely get more.
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 ExcellentWas this helpful?