Teen Leakproof UltraThin No-Show Bikini 3-Pack
Save up to $16
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.
Hanging out or running to your next class? These period undies provide the ultimate comfort you want, plus ultra-thin protection you need from sweat, discharge and leaks. It’s a classic silhouette made with a super soft-and-stretchy, quick-drying material. It absorbs about the equivalent of 2.5 super tampons for an extra dose of confidence on those medium-flow days.
Key Features:
- 360LeakSeal™ patented technology designed to seal in leaks from every angle
- Soft and stretchy for comfort throughout the day
- Seamless look for any OOTD
- Quick dry for that fresh feel
🇨🇦 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.
Kt by Knix for Teens Underwear FAQs
Kt by Knix is designed for smaller and growing bodies to fit teens. Kt Period Underwear are available in teen sizes with smaller leg openings.
Super Absorbency
Absorbs 9–12 tsp (45–60 ml) of blood—that’s about 9–12 regular tampons or pads! Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.
High Absorbency
Absorbs 4–8 tsp (20–40 ml) of blood, or the equivalent of 4–8 tampons or pads. These are perfect for heavy flow days.
Medium Absorbency
Absorbs up to 3 tsp (15 ml), or about 3 tampons or pads worth of blood. Ideal for light to medium flow days or as backup to tampons or period cups.
All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in.
First Layer: Wicks away sweat and moisture while neutralizing odors to keep your teen fresh all day long.
Second Layer: A super thin, highly absorbent liner that holds the power of 3–20 tampons or pads.
Third Layer: A secure, liquid-resistant outer layer keeps leaks from happening.
The short answer: nope! Depending on the absorbency level of the period underwear and the heaviness of your teens flow, your teen can wear our period undies on their own or as a backup to tampons or menstrual cups. They can wear our High and Super absorbency underwear alone and be totally protected, while our Medium absorbency underwear can be worn alone on lighter days or as backup on heavier days.
- Beth C.Verified BuyerPant Size 12Size Purchased LUsage Light Bladder Leaks4 hours agoPant Size 12Size Purchased LUsage Light Bladder LeaksRated 5 out of 5 starsComfortable, effective
I love the sleek fit of these, and the protection without need for a disposable liner
ComfortRated 4.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 4.0 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? - Amanda E.Verified BuyerPant Size 4Size Purchased SUsage Period Back-UpYesterdayPant Size 4Size Purchased SUsage Period Back-UpRated 5 out of 5 starsGreat for light days
They’re comfortable and great for light flow days. No complaints.
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? - Stacie M.Verified BuyerPant Size 8Size Purchased MUsage Period Back-Up3 days agoPant Size 8Size Purchased MUsage Period Back-UpRated 5 out of 5 starsConfidence Guaranteed
I've only used these once so far, but they did the job. I wore a dress, I had my period, and it was a super hot day. They gave me the confidence I needed against any accidents or sweat marks. They are very comfortable, but I would have sized up one size. They are a bit snug even though my measurements put me in a M. That worked fine in a loose dress, but I think it would show too much in anything tighter fitting.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated -1.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful?
