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 Underwear Laundry Bag | Lightweight mesh delicates washing bag

3-pack High-Waist Period Pocket Brief

Available in Light and Moderate.

$74.00 ~~$88.00~~

Our PFAS-free Pocket Underwear 3-Pack keeps your rae Heat Pad secure with leak-proof comfort, plus a mesh laundry bag for easy washing.

Fast-absorbing

Save $$ with Sets

PFAS-Free & Toxin-Free

Organic Cotton Softness

High-Waist Pocket Brief (Size)

6 (XS) 8 (S) 10 (M) 12 (L) 14 (XL) 16 (XXL) 18 (XXXL)

High-Waist Pocket Brief (Style)

Light-Moderate Moderate-Heavy

Why You'll Love it

✨ 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.

Easy Care, Zero Fuss

✨ 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.

Materials & Composition

✨ 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.

Size & Fit

✨ 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!

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 - 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.

3-pack High-Waist Period Pocket Brief

$74.00 ~~$88.00~~

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

To be safe, let’s do some formal introductions…

rae is wireless and rechargeable, with a sleek, comfy design. Designed with three heat settings that go up to 50°C, it lasts up to 5 hours, and is wireless.

Curved for your comfort
Three heat settings, up to 50 degrees
Soft high-quality silicone
Wear with your Period Pocket Underwear

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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 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.

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.

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.

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.

What does the absorbency level mean?

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

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

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

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

★★★★★

“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