Scarlet Period The Sultry Days Set | Period G-String & Invisible Thong

Scarlet Period G-String | Leakproof, Light Absorbency, PFAS-free, Organic Cotton

Scarlet Period Invisible Thong | Like a panty liner, PFAS-free, Soft with 360° stretch

Scarlet Period The Sultry Days Set

Name: Scarlet Period The Sultry Days Set
Brand: Scarlet
Price: 40.0 AUD
Availability: InStock

$40.00 ~~$46.00~~

Light

eqv. 2 tampons

These barely-there bottoms are discreet, perfect for the end of your flow, or on those just-in-case days. Buy the set and save $6.

Chemical-free (no PFAS!)
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Fast-absorbing & Leakproof
Invisible Under Clothes

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Stores all your goodies, like Cups, wet swimmers, and snacks. +$7 (save $3)

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Makes cleaning both your Period Cup and the rae Heat Pad a breeze. +$5 (save $3)

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Keep your undies safe with a Scarlet Period Laundry Bag +$7 (save $3)

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Add rae Period Pocket Underwear +$14

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Keep your Cup clean and fresh with our gentle wash +$5 (save $5)

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Why You’ll Love It

The Set for Sultry Days has two ultra-discreet bottoms designed for comfort, coverage, and confidence - no matter your flow. Both styles feel like your comfiest undies - lightweight, soft, and irritation-free.

⭐ Light Absorbency Period G-String: Holds up to 3 teaspoons (2 tampons) in breathable, GOTS-certified Organic Cotton that’s PFAS-free.

⭐ Invisible Thong Protection: Ideal for spotting and discharge with a seamless, second-skin fit. Choose between classic Black or Nude for a sleek, go-with-everything staple.

Easy Care, Zero Fuss

✨ Rinse in cold water until clear.

✨ Machine wash cold with mild detergent.

✨ Skip bleach and fabric softener - your bikini brief doesn’t need them.

✨ Line dry or tumble dry on low. Simple, right?

Materials & Composition

⭐ Period G-String: 95% Organic Cotton, 5% Spandex, and a Polyester/PUL Quick Dry Gusset.

⭐ Invisible Thong: 76% Polyamide, 24% Elastane, and a Polyester Quick Dry Gusset.

All Scarlet underwear is free from added chemical treatments, including PFAS (independently lab tested).

Size & Fit

✨ Fit Note: Our underwear runs on the slightly smaller side - if you're between sizes, size up.

✨ Teen-to-Adult Fit: Our sizing is unique - please refer to both the numerical (e.g. 10, 12) and letter sizing (e.g. M, L) in our guide.

✨ Australian Sizing: We use AU sizes - international customers, check our Size Guide.

✨ Still Unsure? Contact us for advice. We love a chat!

Planet-Friendly Practices

Did you know that over 12 billion pads and 7 billion tampons end up in landfills yearly? By choosing Scarlet, you're supporting a more sustainable future - where self-care and sustainability go hand in hand.

✨ High-Quality, Safe Fabrics: Made with care, free from PFAS and harmful chemicals, and independently lab-tested for your safety.

✨ Eco-Conscious Manufacturing: Crafted with a focus on quality and reducing environmental impact.

✨ Recyclable Packaging: Minimal waste for a cleaner world.

✨ 1% for the Planet: Scarlet is proud to contribute to environmental stewardship with every purchase.

Your questions, answered

HOW DO THEY WORK?

Scarlet Period Underwear is designed to fit like normal underwear and features multi-layered leak-proof technology that wicks away moisture, absorbs fluid, and contains it to keep you dry and protected.

The built-in leak-proof technology works harder than disposable pads, which means it can safely hold more liquid and last for years, not hours. It is loved by all; you can read some reviews.

WHAT DOES THE ABSORBENCY LEVELS MEAN?

Super Light: Holds up to 1 teaspoon, just slightly less than 1 regular tampon. Think of it as a new-age panty liner, so it’s great for spotting as well as light leaks and discharge. Try: Invisible Thong

Light: Holds up to 3 teaspoons, which is equal to 2 regular tampons or 1 pad. This is for light days to save you from pesky drips, discharge, and lighter flows. Try: G-String, Bikini Brief in Light or Swim range

Moderate: Holds up to 5 teaspoons, which is equal to 3 regular tampons or 2 pads. Go for this on your moderate days or as an extra defence on heavy days with our Period Cup. Try: High-Waisted Brief or Bikini Brief in Moderate

Heavy: Holds up to 7 teaspoons, which is around 4 regular tampons or 3 pads. Our heavy hitter makes them great for full-flow days and overnight. Try: Boyshort or Period Cup

DO I NEED TO WEAR A CUP, TAMPON OR LINER TOO?

Depending on the absorbency level you choose and the heaviness of your flow, you can wear our period panties on their own or as backup protection along with a Period Cup. Take the time to explore a routine that works for you.

On heavy days, we recommend traveling with a water-resistant travel bag such as the Toiletry Bag and a spare pair so you can change them if needed, pop them straight away, and rinse (if you CBF) when you get home.

DO I HAVE TO WASH THEM ASAP AFTER USE?

Nope – who’s that organised? That’s why our Laundry Bag is ace – simply throw your used pair into the bag and store it for when you have a full load. Some people like to give them a quick rinse in the shower before popping into the bag, and others don’t. It won’t affect the lifespan of your underwear.

Once you are ready, simply toss them in on a cold wash cycle with mild detergent (no bleach!). DW, your other clothes will be just fine! You have two options for drying: tumble dry on low or hang them out to dry in the sun.

TIP: if it’s your first wear, pop them in the washing machine with your next cold cycle - washing them before wearing activates their absorbency even more.

Click to read more about how Period Underwear works.

WHAT IS YOUR 30-DAY RISK-FREE TRIAL?

This is a new way to period, and we understand it may take a couple of goes to get into the swing of things. So, we have a 30-day risk-free trial to help you find the perfect pair. Basically, if it’s your first time shopping with us and you’re not happy with your product, you may be eligible to claim a refund on that product, even if it’s used. Just email us at support@scarletperiod.com.

HOW DO I PICK THE RIGHT SIZE FOR ME?

This size guide will help break it down for you. Please make sure to check both our numeric and letter sizes so there is no confusion (e.g., our large is a 12). When in doubt, we advise you to size up.

Still confused? Click for more information on our Returns Policy and our 30-Day Trial Policy. You can also email us at support@scarletperiod.com.

Question

The Secret to Better Periods

Scarlet Period Bikini Brief - Available in Light & Moderate

Period Undies

Built-in period tech wicks away moisture to keep you dry and comfy.

Period Cups

The ultimate guide to folding, inserting, and removing your Period Cup.

Learn More

Scarlet Period High-Waisted Swim Bikini Brief | Light Absorbency, flattering high waist

Period Swim

Period Swim stops your flow from going out and water getting in. genius, huh!

Scarlet rae Heat Pad is slim, rechargeable, and built to fit your life.

Period Heat

Meet rae, the self-care device created heat on the go and go with your flow.

Learn More

★★★★★

"A surefire way to ensure you make mindful, sustainable choices that are good for you and the world you live in."

- STYLE magazine

★★★★★

"These g-string undies made from organic cotton have a mid-rise silhouette with minimal bum coverage."

- Refinery29

★★★★★

"My personal favourite is its G-string - it’s ultra cute and comfy, perfect for lighter days."

- LifeHacker

Better than liners

Super comfy and don't see thru clothes.

Best workout G

Absorbs sweat and hides camel toe lol

Just wear daily

Makes me feel safe post bub

NO VPL

Wear at the end of my cycle and so great. Thanks.

Love them!

These undies are so soft, thin and comfy, I'm really impressed. The very light gusset has been perfect for when my period is near the end and I'm still spotting a bit. I want to buy more to wear as daily undies as they're so comfy, and I expect would be good for during ovulation with catching discharge. They hold in place well without being super tight, I'm usually a size 6 and bought xs and they are a perfect fit.

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Scarlet Period The Sultry Days Set

Your questions, answered

The Secret to Better Periods

Period Undies

Period Cups

Period Swim

Period Heat

Customer Reviews