Athletic Leakproof Bikini

Super comfortable and breathable underwear that features an ultra-thin, built-in liner that absorbs up to 3 tsp (2 tampons) of leaks, period blood, or sweat.

Classic Colors
LTD Edition
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Leakproof Essentials

We've harnessed cutting-edge textile technology to give you that extra confidence and comfort you deserve.
Super Absorbent
Leakproof technology absorbs up to two tampon worth of liquid.
Quick Dry Gusset
Dries 2-3 times faster than regular cotton. And carbon cotton helps eliminate odor.
Seamless Construction
Sits flat against your skin to eliminate panty lines and for superior comfort.
"Best undies ever! Comfortable and do exactly what they say they will!"

– Holly O.

Read More Reviews
They work great for LBL caused by running and are fantastic on lite period days.
Jennifer S.

What You're Wearing

Comfort

Constructed using 4-way stretch fabrics, your Knix match your every move and mold to your unique shape. It's comfort unlike anything.

Versatility

Knix products are tested by 1000s of women to ensure they're ready for real life. And everything that comes with it.

Performance

Moisture-wicking. Anti-odor. Quick dry. And anything else we can do to improve your intimates.

Athletic Leakproof Bikini Reviews

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Athletic Leakproof Bikini
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Classic Colors
LTD Edition