StageProof™ Leakproof UltraThin Underwear
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Invisible period protection that performs when they do.
Made to move
Designed for dancers, these stay comfy under dancewear through practice, performance, and everything in-between. Made specifically for teens and tweens, so may fit smaller than styles made for adults.
Worry-free protection
Built with our patented 3-layer leakproof technology to help lock in leaks from every angle, even while you move, stretch, and jump.
Absorbency level: Moderate
Absorbs about 2 super tampons—perfect for moderate flow days. The carbon cotton gusset top layer keeps you dry.
Discreet
Made from our signature buttery-soft fabric, with a seamless, high-cut fit that's invisible under leotards. No lines, no bulk.
Wear. Wash. Repeat.
100% reusable and machine washable, just like regular underwear.
The Perfect Fit
The fabric feels snug at first but relaxes after washing and wearing, resulting in a perfect fit.
Machine Washable
Wash with like colors on a cold cycle using a mild detergent. Do not bleach, dry clean, or iron. Lay flat to dry.
Fabric
Body: 77% Nylon, 23% LYCRA® XTRA LIFE™ Spandex;
Fresh Fix Technology® Gusset:
Gusset 1: 86% Cotton/Coton, 10% Spandex, 4% Carbon/Carbone;
Gusset 2: 96% Polyester, 4% Spandex;
Gusset 3: 89% Polyester, 11% Spandex, Coating: 100% Polyurethane coating/Revêtement polyuréthane
Exclusive of Decoration
FREE Shipping on orders over $80
Eligible for a return or exchange within 30 days of delivery and with original packages and all tags attached.-
Ordered
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Order Ready
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Why leakproof?
Built-in protection that helps teens feel secure on their period. The science behind the #1 Leakproof Brand in North America.
Comfy, super smooth moisture-wicking liner keeps you feeling fresh and dry.
An absorbent layer holds up to 9 super tampons worth of blood.
Outer layer acts as a barrier to stop any leaks from getting through.
Kt period undies are 100% reusable and machine washable. Throw them in the wash just like regular undies.
Easy to Wash
100% reusable and machine washable, just like regular underwear.
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Great fit!
Love how comfortable these are.
Very good for dance
This product was perfect for a teenager girl that was in a dance summer camp. Very comfortable with no leaking. The fabric is thin enough and few seams are not noticeable through the leotard. Perfect for a dancer.
Read More5 Stars
Dancer approved and tested during an intensive
Absolute Win!
These fit amazingly. Super soft and comfortable. No show. Period protection without the bulk and noise of a pad. I’m only disappointed that I didn’t find these sooner. I’m ordering more!
Underwear for ballet class
The underwear looks very good, thin, soft and the correct size. Has not been used in battlefield as classes have not yet started. But it got the approval of my daughter that she will wear it.
Read Morenot different?
These are fine, but don't seem to be noticeably different from the other bikini styles.
Your questions, answered.
It's easy, we promise. Give them a quick rinse under cold water first, then toss them in the washing machine with your regular clothes, cold water, mild detergent, no softener or bleach. For drying: lay flat for medium absorbency styles, or tumble dry on low for high and super absorbency ones. That's it. No ironing needed!
Good news, period underwear and pads are exempt from federal sales tax in Canada, and most provincial/harmonized sales taxes too. The exception? If your order ships to (or you're shopping in a store in) British Columbia or Manitoba, a 7% PST applies. Saskatchewan, it's 6% PST. Still have questions? We've got more info here.
Each pair has a built-in liner that absorbs period blood, no pad or tampon required (unless you want one!). KT Period Underwear comes in light, moderate, and heavy absorbency so your teen can find what works best for their flow.
Ultra: Absorbs the equivalent of 7-11 super tampons. Our longest front-to-back liner, designed for their heaviest flow days and overnight protection.
Heavy: Absorbs the equivalent of 4–7 super tampons. Great for overnight or the heaviest days when swapping into a fresh pair isn't always an option.
Moderate: Absorbs about 2.5 super tampons' worth. A solid go-to for medium flow days, discharge, and sweat.
Light: Absorbs about 1 regular tampon's worth. Perfect for spotting, lightest days, discharge, and sweat.
Because these are underwear, we can't take back worn pairs, but here's the good news: you can try one pair from your first order risk-free for 30 days!
Ordered the wrong size? We'll send a replacement pair at no cost, or give you a full refund within 30 days of delivery (excluding original shipping).
If your order had multiple pairs, just open and try one. Any unopened pairs from the same order are eligible for an exchange or refund within 30 days. And heads up, all sale items are final sale.