High-performance period underwear

YOUR PERIOD BUT MAKE IT SEXY

LEAK-PROOF TECH

LUXURY & FUNCTION

HIGH-QUALITY FABRICS

SUSTAINABLE

As Featured On

why siren?

Periods happen but ugly underwear? Unacceptable.

SIREN is what happens when luxury lingerie and leakproof tech have a love child - high-quality, curve-hugging and totally unapologetic.

We’re here for the days you feel unstoppable and the days you’d rather bite someone’s head off.

No leaks. No shame. Just sexy, sustainable underwear that makes your cycle feel a little more you.

Because your period isn’t a crisis it’s a damn superpower.

And with SIREN, you’ll look so good doing it, you might just forget you’re bleeding.

Discover SIREN and Step into a new era of periodwear

HOW IT WORKS


DRY FEELS BETTER
Our breathable top layer pulls moisture away from your skin the moment it hits keeping you fresh, dry, and irritation-free all day long.

POWER IN EVERY LAYER
A high-performance absorbent core draws fluid in fast and locks it tight. No bulk. No dampness.

MOVE WITHOUT WORRY
An ultra-thin barrier stops leaks before they even think about happening. Lightweight, flexible and designed to move with your body, not against it.

CONFIDENCE, REINFORCED
Strategic leakproof zones protect where it matters most, giving you that “I’m covered” confidence even on heavy-flow days.

COOL, CALM AND LEAKPROOF
Our breathable outer layer seals everything in while letting air flow freely. Stay cool, dry, and unstoppable - no matter your cycle.

save more with bundles

Create your dream lineup with SIREN’s curated Bundles & Packs designed for every flow, every fit and every mood.

More coverage. More confidence. More you.

SEE WHAT OUR CUSTOMERS SAY

★★★★★

"I've always dreaded my period days, but SIREN has completely changed that! The fabric feels amazing and I feel super secure even on my heavy days. I actually look forward to wearing them."

Rachel G.
★★★★★

"I’ve tried so many brands and always felt like I was wearing nappies! SIREN actually feels like normal underwear. Super soft and flattering. I caught myself checking me out in the mirror on day two. Never thought that would happen haha!"

Emily R.
★★★★★

"I love that I don’t have to rely on disposable products anymore. SIREN has saved me so much money and I feel great knowing I’m choosing an eco-friendly option. Lingerie and function at its best!"

Sophia V.
★★★★★

"The fit is perfect, and they’re so easy to wear with anything. From my gym leggings to my dresses, I feel confident and protected. SIREN has completely changed my perspective on period products."

Mia K.
★★★★★

"These are hands-down the best period underwear I’ve tried! They’re comfortable, stylish, and, most importantly, reliable. I trust SIREN with every outfit and every occasion."

Harper H.

OUR STORY

We got sick of periodwear that screamed “don’t look at me." So we made SIREN - the kind of periodwear that makes you want to show off.

Our designs fuse lingerie-level appeal with serious leakproof technology that can handle any flow.

Because feeling secure should never mean feeling boring.

You deserve protection that moves with you, hugs your curves and looks damn good doing it.