Athletic Bikini

Our moisture-wicking performance underwear maximize movement and comfort during your most intense workouts. And seamless technology means no panty lines will ever distract you from kicking butt.

Classic Colors
LTD Edition
Questions & Answers

Athletic Underwear Essentials

We set out to create underwear that works as hard as your workout. And it was worth the sweat.
Bonded Construction
No more visible panty lines. Even under those super-tight yoga pants.
Quick Dry Gusset
Dries 2-3 times faster than regular cotton and carbon cotton fights odor.
Super Soft Fabric
Moisture-wicking fabric feels like it's caressing your skin.
"My search for the perfect undergarment has come to an end."

– Leslie B.

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Build Your Set

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How It Fits

A classic mid rise silhouette with medium coverage through the hip and bum. Stretch tech means these will relax a bit more than the Everyday line. Concerns? Contact us here. 


Body: 77% nylon, 23% LYCRA®
Gusset liner: 86% cotton, 10% spandex, 4% carbon


Machine wash cold with mild detergent, do not bleach, lay flat to dry.

I feel cool and dry after a whole day's worth of wear.
Feliz S.

Tech To Take

Your Life Back


We're done with uncomfortable underwear. With 4-way stretch fabrics, your Knix move and mold to your shape.


Each Knix product is tested by 1000s of real women to make sure it's ready for your real life.


Moisture-wicking. Anti-odor. Quick-dry. Because we know what it takes to conquer your day.

Athletic Bikini Reviews

Q & A


Q: Is there a way to sign up for a waiting list, or some kind of notification when XL is back in stock? Will they be back in stock?


A: Yes! You should have the option to sign up for a Back in Stock notification located under the product page.