Name: Mid-Waist Seamless Period Underwear
Brand: SIREN
Price: 39.95 AUD
Availability: InStock

$49.95 $39.95 Save $10.00

In stock, ready to ship
Backordered, shipping soon

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.

Quantity

Our most secure style designed to handle your heaviest days with zero stress and zero bulk.

Why you'll love it:

Up to 10 tampons worth of absorbency
4-Layer ConfidenceTech™ + extra leak-guard panels
Stays dry - moisture-wicking & fast-absorbing top layer
Odour-control and fast-wick lining - stay fresh + clean feeling
Mid-waist, sculpting fit - smooths & supports
Seamless finish - no lines, no padding feel
Ultra-soft & breathable - comfort that moves with you

Best for:
Heavy flow days • Overnight • Postpartum • High-movement days

Is SIREN Periodwear sustainable?

Yes - SIREN is crafted with certified, planet-friendly materials and ethical production.
✔ OEKO-TEX® certified fabrics – free from harmful substances.
✔ FDA-approved textiles – safe for skin contact.
✔ GRS-compliant sourcing – supporting responsible and sustainable manufacturing.

How do I wash my SIREN?

Rinse in cold water after use, then machine-wash on a gentle cold cycle (no bleach or fabric softener).
Air dry flat - treat them like your favourite lingerie for long-lasting performance.

How long can I wear SIREN?

Up to 10+ hours of leakproof protection, depending on your flow.
SIREN’s absorbent technology keeps you feeling dry, fresh and confident all day or night.

What makes SIREN different from other period underwear brands?

SIREN redefines periodwear - high-end design meets high performance.
Our underwear looks and feels like real lingerie, not nappies. They're sculpting, made with premium fabrics and 10+ hours of leakproof protection - all backed by our 60-Day Leakproof Guarantee.

How does SIREN Periodwear work?

SIREN uses a 4-layer absorbent system that wicks moisture, locks in leaks, and keeps you dry and comfortable.
Extra-thin leakproof linings in the gusset give you protection exactly where you need it without bulk.

Where do you ship?

We ship Australia-wide 🇦🇺
✔ Free standard shipping on orders over $100

What is your return policy?

Every pair is backed by our 60-Day Leakproof Guarantee.
If you’re not in love with your SIREN Periodwear, email us at admin@sirenperiodwear.com

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