Medium

Leakproof UltraThin No-Show High Rise

Underwear with a liner so unbelievably thin, yet so unbelievably protective.

Medium

Leakproof UltraThin No-Show High Rise

Underwear with a liner so unbelievably thin, yet so unbelievably protective.

The very latest in leakproof innovation – get more absorbency without any extra bulk! Features an ultra-thin liner that absorbs the same as about 2.5 super tampons, and 360LeakSeal™ technology that locks in leaks at every edge. You get the protection you want from periods and light bladder leaks, so you can feel super comfy and worry-free every single day of the month.

Plus, we've added our logo to the liner, so you can tell the difference between these pairs and our lighter leakproof underwear.

Medium

Leakproof UltraThin No-Show High Rise

Underwear with a liner so unbelievably thin, yet so unbelievably protective.

Medium

Leakproof UltraThin No-Show High Rise

Underwear with a liner so unbelievably thin, yet so unbelievably protective.

Ultra

Extra heavy periods, overnight protection & light bladder leaks - absorbs about 13-17 tsp or 65-85 mL which is the equivalent of 7-9 super tampons’ worth.

Heavy

Heavy periods, overnight protection & light bladder leaks - absorbs about 6-11 tsp, 30-55 mL or the equivalent of 3-6 super tampons’ worth.

Medium

Medium periods, light bladder leaks & sweat - absorbs about 3-6 tsp, 15 -30 mL or the equivalent of 2-3 super tampons’ worth.

Light

Light periods, backup protection & sweat - absorbs about 1.5-3 tsp, 7.5-15 mL or the equivalent of 1-3 regular tampons’ worth.

Lightest

Lightest periods, spotting, sweat & discharge - absorbs about 1-1.5 tsp, 4-7.5 mL or the equivalent of 0.5-1 regular tampon worth.

Zero

Everyday wear with no leakproof protection - zero absorbency.

	Absorbency	Good for
Ultra	Absorbs about 7-9 super tampons’ worth	Extra heavy periods, overnight protection & light bladder leaks
Heavy	Absorbs about 3-6 super tampons’ worth	Heavy periods, overnight protection & light bladder leaks
Medium	Absorbs about 2-3 super tampons’ worth	Medium periods, light bladder leaks & sweat
Light	Absorbs about 1-3 regular tampons’ worth	Light periods, backup protection & sweat
Lightest	Absorbs about 0.5-1 regular tampon worth	Lightest periods, spotting, sweat & discharge
Zero	Zero absorbency	Everyday wear with no leakproof protection

Our Leakproof Period Underwear features multi-layer technology that differs from style to style, but works to ensure you stay fresh, dry and protected. For example, in our Super Leakproof™ No-Show Bikini, the top layer wicks away moisture from your skin; the inner-layer absorbs the liquid and locks it in; and the outer layer keeps any liquid from spotting your clothes.

Write a Review (Opens in a new window)

40 reviews

Sort

Laurie L.
Verified Reviewer
15 minutes ago
Rated 5 out of 5 stars
Best of all I have tried!
I have ordered knix and two other brands in the last two weeks and the knix is the winner hands down. It is the most comfortable by far. The other big name that ends in an x had a horrible texture to the liner that quite literally "grated" tender spots, while the cheaper brand option was just that, cheaper price cheaper quality. I'm your new customer for life!
Was this helpful?
Julie W.
Verified Buyer
13 hours ago
Rated 5 out of 5 stars
Love them
I feel secure when I wear them. No leaks.
Was this helpful?
Alessandrina R.
Verified Buyer
19 hours ago
Rated 5 out of 5 stars
Perfect!
Amazing fit and they actually work.
Was this helpful?