Home/Scarlet Period | Made for a Heavy Flow/High-Waist Pocket Period Brief
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period rae Heat Pad fits neatly into our Period Pocket Underwear
Scarlet Period Pocket Underwear are designed with a discreet pocket to securely carry your rae heat device so you can access pain relief on the go.
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period Pocket Underwear keeps the rae heat device away from your skin to protect your skin for ongoing use, and it makes it move with you wherever your day takes you. 
Shop Scarlet Period Pocket Underwear - available in light and moderate
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period rae Heat Pad fits neatly into our Period Pocket Underwear
Scarlet Period Pocket Underwear are designed with a discreet pocket to securely carry your rae heat device so you can access pain relief on the go.
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort
Scarlet Period Pocket Underwear keeps the rae heat device away from your skin to protect your skin for ongoing use, and it makes it move with you wherever your day takes you. 
Shop Scarlet Period Pocket Underwear - available in light and moderate

High-Waist Pocket Period Brief

Available in Light and Moderate

$24.00

The clever one. Everything you love about our period undies, plus a discreet pocket built to hold rae, your wearable heat pad, right where the cramps are.

Organic cotton, leak-proof lining, PFAS-free and lab tested. Available light-moderate or moderate-heavy. Wear it with rae, or on its own as a very good pair of period undies. No judgment either way.

    Organic Cotton Softness
    Comfortable Stretch Fit
    Comfy & Body-safe
    Functional Pocket Storage
Size
Style
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Australian designed · PFAS-free · 30-Day Risk-Free Trial

✨ Functional Pocket: Discreet pocket for carrying your rae heat device.

✨ Full Coverage & Comfort: High-waisted for a secure, flattering fit.

✨ Leak-Proof Protection: Fast-absorbing gusset keeps you dry.

✨ Two Absorbency Levels: Choose Light-Moderate or Moderate-Heavy.

✨ Soft, Breathable Cotton: Made from organic cotton.

✨ Rinse in cold water after wear (until the water runs clear).

✨ Machine wash cold with a mild detergent.

✨ No bleach, no fabric softener - your undies will thank you.

✨ Line dry or tumble on low for easy care.

Read more about cleaning your Period Underwear. 

✨ 95% GOTS Certified Organic Cotton for softness and breathability.

✨ 5% Spandex for the perfect stretch and a comfortable fit.

✨ Polyester/PUL Gusset that’s quick-drying and leak-proof.

✨ PFAS-Free & Toxin-Free - because you deserve better.

✨ Fit Note: We run slightly smaller so 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 - one where self-care and sustainability go hand in hand.

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

✨ Body Safe: No harmful chemicals, always PFAS-Free.

✨ Recyclable Packaging: Minimal waste for a cleaner world.

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

Size Chart

Size chart for High-Waist Pocket Period Brief
Scarlet Period High-Waist Pocket Brief – Heat Pad Pocket, Leak-Proof Comfort

High-Waist Pocket Period Brief

$24.00
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Scarlet Period rae Heat Pad: Wireless relief, soft silicone, smart period care.

Have you met rae, the heat pad that goes with your flow?

The Pocket Brief was built to hold it, right where the cramps are.

rae is wireless and rechargeable, with three heat settings up to 50°C and 5+ hours on low. Slip it into the pocket and get on with your day.

  • Curved for comfort
  • Three heat settings, up to 50°C
  • Soft-to-touch, food-grade silicone
  • Made to pair with your Pocket Brief
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Your Questions, Answered

Umm, what is rae?

rae is a wireless, wearable heat pad designed for period and pelvic comfort on the go. No cords, no microwaving, and no stick-on patches. Just rechargeable heat that fits discreetly under your clothes.

Can I use the undies without rae?

We’re not here for rules, so you do you boo! They do have additional fabric for the pocket at the front so if not using with rae, you might prefer our Bikini Brief or High-Waisted Brief.

Can I use rae without the undies?

rae is designed to get hot, so we do recommend using rae with them or otherwise over your undies. If using directly on the skin, start at the lowest setting and monitor your comfort.

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 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 does the absorbency level mean?

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

Light: Holds up to 3 teaspoons, equal to 2 regular tampons or one pad. For light days, drips and discharge. Try: G-String or Bikini Brief in Light-Moderate

Moderate: Holds up to 5 teaspoons, equal to 3 regular tampons or 2 pads. For moderate days, or as extra defence on heavy days with our Period Cup. Try: High-Waist Brief or Bikini Brief in Moderate-Heavy

Heavy: Holds up to 7 teaspoons, equal to 4 regular tampons or 3 pads. Our heavy hitters are great worn on their own, day or night. Try: Boyshort or Period Cup

Will period underwear actually hold a heavy flow?

That's the whole point of them. Pocket Brief comes in two absorbency levels: Light-Moderate (about 2 regular tampons) and Moderate-Heavy (about 3 regular tampons). The leak myth comes from older, thinner designs. Ours uses a multi-layered, fast-absorbing gusset built to actually do the job.

Is Pocket Brief PFAS-free?

Yes, always. PFAS are the "forever chemicals" used to waterproof some fabrics, and most people wearing them have never heard the term. Pocket Brief is PFAS-free, independently lab tested.
★★★★★

“Pair [rae] with Scarlet’s leak-proof undies with a built-in pouch, and you’ve got a period-care revolution on your hands.”

Sitchu

★★★★★

“rae’s cool factor doesn’t stop at just being cordless - it slides discreetly under clothes without any noticeable lumps.”

Women Love Tech

★★★★★

“Comfortable, full coverage, and, most importantly, leak-free. A bonus: [they] are machine washable.”

NEWS

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