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Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Bikini Brief - Available in Light & Moderate
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Bikini Brief - Available in Light & Moderate
Scarlet Period All Over Cleanser is naturally scented with an allergen-free and pH-friendly
Scarlet Period All Over Cleanser is naturally scented with an allergen-free and pH-friendly
Scarlet Period Underwear Laundry Bag | Lightweight mesh delicates washing bag
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Bikini Brief - Available in Light & Moderate
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Bikini Brief - Available in Light & Moderate
Scarlet Period All Over Cleanser is naturally scented with an allergen-free and pH-friendly
Scarlet Period All Over Cleanser is naturally scented with an allergen-free and pH-friendly
Scarlet Period Underwear Laundry Bag | Lightweight mesh delicates washing bag

Go With The Flow Set

Flow handled. Morning to night.

$78.00 $84.00

Two cuts, two moods, one wash bag and a cleanser that doesn't smell like a hotel lobby. The set for anyone still working out which style they actually reach for. 

    Chemical-free (no PFAS!)
    Save $$ with Sets
    Organic Cotton Softness
    Comfortable Stretch Fit
Scarlet Period Bikini Brief (Size)
Scarlet Period Bikini Brief (Style)
Scarlet Period Boyshort (Size)

Nobody picks their style off a size chart. You pick it after a cycle or two, once you know which pair you keep reaching for on day two and which one lives at the back of the drawer.

So this set gives you both. The Bikini Brief sits low and disappears under most things. The Boyshort covers more and is the one people quietly admit they sleep in. Both are 95% organic cotton and 5% elastane with multi-layered moisture-wicking.

PFAS-free and independently lab tested. Not "chemical-free", which means nothing. PFAS-free, which means something.

The All-Over Daily Cleanser is pH-balanced and hydrating, for bits and beyond. The mesh bag stops your undies getting mangled by a zip.

⭐ Period Undies: Rinse in cold water, machine wash cold with mild detergent, and line dry or tumble dry low. Do not bleach or use fabric softener.

⭐ Scarlet Laundry Bag: This mesh bag protects period undies, activewear, and delicates on laundry day.

⭐ Daily Intimate Cleanser (Scented): The same gentle, pH-balanced, all-over wash, now with a soft scent. Calendula, hemp extract and jojoba to keep skin comfortable, balanced for your whole body and intimate area.

✨ Period Undies: They are made from 95% organic cotton and have a PFAS-free, quick-dry gusset for breathable, leak-proof protection.

✨ Daily Intimate Cleanser (Scented): Hypoallergenic, vegan, and cruelty-free, made to love even the most sensitive skin. Made in Melbourne.

✨ 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!

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.

✨ GOTS Organic Cotton: Soft, breathable, and sustainably grown.

✨ PFAS-Free, No Harmful Chemicals: Because your body - and the Earth - deserve better.

✨ Recyclable Packaging: Minimal waste for a cleaner world.

Scarlet is proud to be a 1% for the Planet member, joining a global movement dedicated to environmental conservation.

Size Chart

Size chart for Go With The Flow Set

Go With The Flow Set

$78.00 $84.00
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Care goes beyond undies

Your cycle isn’t one-size-fits-all - and neither is this kit.
The Flow Kit is packed with comfort, care, and a little extra self-love to help you through the ups and downs and heavy nights.

  • Bikini Brief for everyday wear
  • Boyshort heavy protection for overnight flow
  • Magnesium+ Spray to relax belly tension
  • Laundry Bag to keep undies safe on wash day
BUY NOW

Your Questions, Answered

How do I wash them?

After use, rinse them in cold water (we recommend in the shower) until they run clear. Then, machine wash in cold water with mild detergent (no bleach!). Try our Laundry Bag to safeguard them on laundry day. Then just hang out to dry (the sunnier the better) or tumble dry on low - that’s it!

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.

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 is harder working than disposable pads which means it can safely hold more liquid and last for years not hours. Loved by all; you can read some reviews.

How do I pick the right size for me?

We get it, sizing for bottoms is anything but standardised. Which is why this size guide will help break it down for you. Make sure to check both our numeric and letter sizing so no confusion (ie. our large is a 12).

When in doubt, feedback tells us better to size up. Still confused? You can also email us for help at support@scarletperiod.com.

What is your 30-day risk-free trial?

We offer a 30-Day Risk-Free Trial for first-time shoppers for one pair of underwear. If you’re unsatisfied or have sizing concerns, email us at support@scarletperiod.com.

Is all-over daily cleanser cruelty-free?

Sure is! We only use a blend of science and nature to formulate all our products, and never any animal by-products. Our products are only ever tested by our community, right here in Australia.
★★★★★

"Their mid-rise Period Bikini Brief is the perfect day-to-day option; available in nifty bundles to save some dough, too."

Harper’s Bazaar

★★★★★

"This is a great one. Spray it on your stomach. My sister has bad period pain and loves it."

You Beauty

★★★★★

"Comfy and casual... won’t make you feel like you’re wearing a giant nappy."

Body and Soul

Real advice for real cycle days