No more worrying about leaks. Period protection designed just for teens.

Leakproof period underwear

Periods shouldn’t come with this much stress

Periods are a top 5 anxiety-driver for teens. From school to overnight to just getting through the day, they worry about leaks a lot.

Kt period solutions can help them stop:

• Leaking overnight
• Leaking through clothes and sheets
• Constantly checking “just in case”
• Wearing backups
• Suffering through bulky pads and painful tampons

Period underwear, swim, and active look just like regular clothing, but they absorb leaks, protect against accidents, and help teens move through their day with confidence. So your teen can focus on being a teen.

Leakproof layers
LOVED BY TEENS. TRUSTED BY PARENTS.

Why leakproof?

Built-in protection that helps teens feel secure on their period. The science behind the #1 Leakproof Brand in North America.
Soft top layer

Soft top layer

Comfy, super smooth moisture-wicking liner keeps you feeling fresh and dry.
Middle absorbent layer

Middle absorbent layer

An absorbent layer holds up to 9 super tampons worth of blood.
Bottom leakblocker layer

Bottom leakblocker layer

Outer layer acts as a barrier to stop any leaks from getting through.
How to wash

How to wash

Kt period undies are 100% reusable and machine washable. Throw them in the wash just like regular undies.

Leakproof Absorbency Guide

Good for

Our longest front-to-back liner, designed for their heaviest flow days and overnight protection.

Absorbs

About 7-11 super tampons or 1.5-2.5 super pads

Good for

Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.

Absorbs

About 4-7 super tampons or 1.5-3 regular pads

Good for

Designed for moderate flow days and everyday comfort.

Absorbs

About 2-4 super tampons or regular pads

Good for

Light protection for daily wear and confidence.

Absorbs

About light flow protection.

First Pair Risk-Free Policy

First Pair Risk-Free Policy

Because they’re, well, underwear, we can’t accept exchanges or returns on used items. BUT you can try your first pair on your first order risk-free for 30 days!

If you ordered the wrong size of period underwear, we’ll send you a different pair at no cost or offer you a standard refund* within 30 days of delivery (excluding original shipping fees).

If your order included multiple period underwear, open, wash, and wear one pair only. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or a standard refund* (excluding original shipping fees).

All unopened packages will be donated to local organizations to support people in need.

Shop Period Undies

Totally Not TMI

Kt Period
Playbook

There’s zero shame in teens wanting confidence,
not confusion when it comes to periods.
That’s why we made this free guide and workbook
just for them.

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.

Each pair has a built-in liner that absorbs period blood, no pad or tampon required (unless you want one!). Period underwear comes in different absorbency levels so you can find what works best for your flow.

Ultra: Absorbs the equivalent of 7-11 super tampons. Our longest front-to-back liner, designed for heavy flow days and overnight protection.

Heavy: Absorbs the equivalent of 4–7 super tampons. Great for overnight or heavier days.

Moderate: Absorbs about 2.5 super tampons' worth. A solid go-to for medium flow days.

Light: Absorbs about 1 regular tampon's worth. Perfect for spotting, lightest days, discharge, and sweat.

Totally up to them! Every flow is different, and there's no wrong answer. Depending on the absorbency level and how heavy their period is, they can wear period underwear on their own or use them as backup.

Because they’re underwear, we can’t accept exchanges or returns on used items.