Sports Illustrated Swim May 2023 Mobile

As seen in Sports Illustrated

Period Swimwear featured in the swimsuit issue for the first time ever!


Swimwear for real life

Real bodies doing real things in really cute swimwear. We wouldn’t have it any other way.

Supportive tops
From A-G cups with specific styles for plus cups.

Leakproof Options
Made for confidence in the water on your period.

Made to move
Amazing looking UPF 50+ swimwear you can actually do stuff in.

How does Leakproof Swimwear work?

The layers work to trap and absorb your period so it doesn’t leak in the water (or on land). Similar Leakproof Technology to our Period Underwear, but with an additional thin layer of waterproof material for extra protection. So blood stays in and water stays out.

Looks just like a regular swimsuit.

Absorbs about 3 tsp of blood.

✔Machine washable
Easily wash and lay flat to dry.

Swim Tops Ashley Graham

Your kind of top

Find a top that makes you feel confident and supported.

Swim Top Styles - Deep V

Deep V 

Supportive and comfortable with a dramatic v-neckline.

Swim Top Styles - Scoop


A scoop neckline for a sportier look and a bit more coverage.

Swim Top Styles - Sculpt Bandeau

Sculpt Bandeau

Built-in support with molded foam cups for great shape and lift.

Swim Top Styles - Balcony Cup

Balcony Cup

Layered fabric creates an underwire look, but without the underwire.

Swim Top Styles - High Energy

High Energy

A sporty cut with a high neck, racer back and zipper front.

Steph Shep
Swim Bottoms

Your kind of bottom

Find a bottom that makes you feel your most confident. Including Leakproof styles that absorb 3 tsp of blood.

Knix High Rise Band Bottom Orange Zest Front

High Cut High Rise

A cheekier cut with compression waistband for smoothing support. Available in leakproof.

Knix Leakproof Ultra High Bottom Lava Front

Ultra High Rise

Medium butt coverage with flattering, high rise coverage in the midriff area. Available in leakproof.



A fan-favorite. Medium butt coverage and a mid-rise. Available in leakproof.

Hip Hugger

Leakproof Swim Short

For those to prefer to feel more covered. Only available in leakproof.

one piece

Your kind of one piece

Find a swimsuit that makes you feel like the main character. 

Balcony Cup

Balcony Cup

A fun and flirty style with the look of underwire (without the wires) & medium butt coverage.



Ultra-flattering wrap style with customizable tie. Adjustable straps & medium butt coverage.

Your swimwear questions, answered.

Virtual Fittings Swim

Book a Virtual Fitting

Not sure which size to order? Connect with a Knix expert for a free 1-on-1 fitting session over video chat.

Value Prop