Name: Seamless Cheeky | Period Underwear
Brand: SIREN
Price: 40.95 AUD
Availability: InStock

$49.95 $40.95 Save $9.00

Size

In stock, ready to ship
Backordered, shipping soon

Size chart

SIREN Periodwear Sizing Guide

To ensure the perfect fit for comfort, sculpting, and leakproof protection, it's important to measure correctly. Here’s how you can get your accurate underwear size before purchasing SIREN Periodwear:

1️⃣ Measure Your Waist

🖤 Where to measure: Wrap the measuring tape around the narrowest part of your waist (above your belly button but below your ribs).
📏 Tip: Keep the tape snug but not too tight—you should be able to breathe comfortably

2️⃣ Measure Your Hips

🖤 Where to measure: Stand with feet together and measure around the widest part of your hips and buttocks (this is usually about 7–9 inches below your waist).
📏 Tip: Ensure the tape is level all the way around for the most accurate measurement.

Consider Stretch & Fit

✔ SIREN’s underwear is sculpting, seamless and made with high-stretch fabric.

Need Help?

Not sure which size to get? Message us! Our team is happy to help you find the perfect fit so you can feel confident, comfortable, and protected.

Quantity

How It Works
Add any combination of styles & sizes with no restrictions

Your bundle discount will automatically apply at checkout no code needed.

BUNDLE DISCOUNTS 🖤

ANY 3 → 15% Off
ANY 4 → 20% Off
ANY 5 → 30% Off
ANY 7 → 40% Off

Free Shipping + Free Wash Bag with all bundled purchases ✨

A SIREN Favourite
Holds up to 5 tampons ideal for moderate flow days
Invisible under everything sleek, sculpting & second-skin soft
4-layer leakproof tech designed for 10+ hours of reliable protection
Odour control built in for that all-day fresh feeling
No bulk, no bunching just smooth, seamless confidence
Breathable + moisture-wicking made to move with you
The ultimate multitasker perfect for daily wear, workouts or mid-flow days

✨ A SIREN staple — designed for comfort, built for confidence.

What makes SIREN different from other period underwear brands?

SIREN is more than just periodwear it’s luxury, function and confidence combined. Our seamless, sculpting designs feel like your favourite lingerie while delivering 10+ hours of leakproof protection. No bulk. No compromise. Just periodwear redefined.

How does SIREN periodwear work?

SIREN’s advanced 4-layer absorbent technology locks in moisture, wicks away sweat, and prevents leaks so you feel dry, fresh, and secure all day. Our leak-proof lining strips provide extra protection exactly where you need it, without sacrificing comfort or style

How long can I wear SIREN period underwear?

Our periodwear provides up to 10+ hours of leakproof protection, depending on your flow.

What absorbency levels do you offer?

Light Flow (20ml) → Equivalent to 4 regular tampons
Medium Flow (30ml) → Equivalent to 6 tampons
Heavy Flow (50ml) → Equivalent to 10 tampons

Is SIREN periodwear sustainably made?

Yes - SIREN is committed to sustainability and ethical production. Our periodwear is crafted in facilities that adhere to the highest international standards for safety, sustainability, and fair labor practices.

✔ OEKO-TEX® Certified Fabrics – Made with materials that are tested and certified to be free from harmful substances, ensuring safety for intimate wear.
✔ FDA Approved Materials – Our components meet global safety standards for medical-grade textiles and skin contact.
✔ Global Recycle Standard (GRS) Compliance – Supporting responsible sourcing and environmental sustainability

Where do you ship?

We ship Australia-wide with FREE shipping on orders over $100 and FREE express shipping on orders over $199.

What’s your return policy?

💡 60-Day Money-Back Guarantee
We believe in our products so much that if you’re not completely in love with your SIREN periodwear, we’ll make it right—just email us at admin@sirenperiodwear.com.

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SOFT ON SKIN.
SAVAGE ON LEAKS.

ADVANCED LEAKPROOF TECHNOLOGY

Top Layer:
Soft, breathable & moisture-wicking

Ultra-Absorbent Core:
Quickly pulls in fluid and locks it away

Waterproof Barrier:
Stops leaks in their tracks

Breathable Outer Layer:
Sculpted, smooth & seamless

Leakproof Lining Strips In Gusset:
Extra reinforcement where you need it most (front, back + sides)

Luxe Fabrics. Unstoppable Confidence.

SIREN blends leakproof power with lingerie level vibes with sculpting fits, lace trims and luxe fabrics that don't just protect they empower. It's second skin comfort and silhouettes that make you feel unstoppable even when you're bloated and bleeding.

Sustainable. Game Changing.

Ditch the landfill guilt and hello to sustainability for your period.
SIREN's eco-luxe periodwear is designed to outlast, outperform and outshine every "quick fix" period product. Less waste, more wow. Your body and the planet will thank you.

Sad cycle energy? we're done.

From bodycon nights to oversized trackies, SIREN moves with you. Our sleek, seamless designs disappear under any outfit so you can feel confident, secure and completely unstoppable, no matter the occasion.

Awesome!

These are the best. Just felt like wearing normal underwear but no leaks even on my heaviest day! 100% would recommend.

Soooo comfy! Absolutely love these period undies. The material is super soft and stretchy and no leaking.

Favourite pair of period undies. Nice material and I love that they’re seamless

Could have sized down, they are comfy and look nice but make me itchy

Seriously look and feel like normal undies

Hands down best period underwear I’ve come across they’re so thin. Completely seamless as well and I didn’t have any leaks!

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