$10 SIREN Gift Card

$10 SIREN Gift Card

$10.00
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  • Still panicking every time you stand up, convinced you've leaked through? Our all-day leakproof protection holds through workouts, long days and everything in between, so you can sit, stand and move without worrying about surprise leaks.
  • Done with a waistband that digs in when period bloat hits? Our seamless, soft-stretch design moves with your body instead of against it, so you stay comfortable even on your most bloated days.
  • Sick of feeling damp and worried about unwanted smells? Our quick-dry top layer helps keep you feeling dry, while our built-in odour control helps you stay fresh throughout the day.
Size chart

SIREN Periodwear Sizing Guide

Measure Your Waist

Where: Wrap the tape around the narrowest part of your waist — above your belly button and below your ribs.
Tip: Keep it snug but comfortable; you should be able to breathe easily.

Measure Your Hips

Where: Stand with your feet together and measure around the fullest part of your hips and buttocks (usually 7–9 inches below your waist).
Tip: Make sure the tape is level all the way around for an accurate measurement.

Consider Stretch & Fit
✔ SIREN’s fabrics are sculpting and high-stretch for a flattering fit.
✔ For our Super Absorbency and Lace Brief, size up if you’re between sizes (these styles have less stretch due to their absorbent layers).
✔ For our Seamless cheeky styles, choose your regular size or size down for a firmer feel.

💌 Need a Hand?

Not sure which size to choose?
Message us and our team will help you find your perfect fit so you can feel confident, comfortable and completely covered.

Can I wear SIREN instead of pads or tampons?
Yes - SIREN is designed to fully replace them. No doubling up, no backup needed. Just put them on and get on with your day.

How long can I wear them?
Up to 10+ hours depending on your flow. Day or night, they've got you covered.

What's your return policy?
We offer a 60-day money back guarantee - try them risk-free.

  • Worn a pair and it's not for you? Contact us within 60 days for a refund. You keep them.
  • Multiple items ordered? Any unworn items need to be returned for a full refund.
  • Size exchange or change of mind? Items must be unworn and return shipping costs are the customer's responsibility.

Email admin@sirenperiodwear.com with your order number and we'll sort it.

Are the fabrics safe?
Yes. SIREN uses certified, body-safe materials - OEKO-TEX® certified, FDA-approved, and GRS-compliant. No harmful substances, no compromises.

How do I wash them?

  • Rinse in cold water after use
  • Machine wash cold, gentle cycle
  • No bleach, no fabric softener
  • Air dry flat - no tumble drying

Cared for properly, they'll last years.

Where do you ship?
Australia-wide 🇦🇺 FREE standard shipping on orders over $100.

SOFT ON SKIN.
SAVAGE ON LEAKS.

FOUR LAYERS. ZERO LEAKS.

Top Layer
95% cotton. Soft, breathable, stays dry against your skin.

Ultra-Absorbent Core
Pulls fluid in fast. Locks it away. Nothing comes back through.

Waterproof Barrier
Nothing gets past this layer. This is what makes our Leakproof Guarantee possible.

Outer Layer
Smooth, seamless, invisible under anything.

Looks and feels like normal underwear.

The seamless construction means no visible panty line, no bunching, no tell-tale outline under your clothes. It sits flat, moves with you and looks exactly like normal underwear because that's the whole point.

Designed Around Real Bodies.

Leaks don't follow a straight line, they track forward, backward and to the sides depending on how you're sitting, sleeping or moving. That's why our absorbent zone extends further than standard period underwear, covering you from every angle no matter what position you're in.

ALL DAY WEAR. No Top Ups.

Most period underwear is built for light days and a drip test. SIREN is built for real flow, fast-absorbing layers that lock blood in and keep you dry all day without needing to change or double up.

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