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rae named Best in Class: Consumer Electronic Product of the Year 2025

Scarlet Period rae Heat Pad: Portable, USB-powered warmth for period pain.

Scarlet Period’s rae Heat Pad offers warmth for over 4 hours.

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.

Scarlet Period rae Heat Pad: 50°C heat, 3 soothing, comfy settings.

Scarlet Period Pocket Underwear includes a discreet pocket to hold rae.

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Q: How long does the battery last?

Battery life depends on your heat setting, but generally:• Low: 5+ hours• Medium: up to 3 hours• High: up to 2 hours

$175.00 ~~$201.00~~

Two Pocket Undies, because one becomes a maths problem the second it goes in the wash. Wash one, wear one, and rae stays where you put it all cycle.

Award-winning Design

Leak-proof protection

Comfy & Body-safe

1% for the Planet

High-Waist Pocket Period Brief (Size)

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

High-Waist Pocket Period Brief (Style)

Light-Moderate Moderate-Heavy

Why You'll Love it

The full setup, doubled where it counts.

✨ rae Wearable Heat Pad: Wireless and USB-C rechargeable, up to 50 degrees with three settings. Silent, splash-proof, about 270g.

✨ Period Pocket Undies x 2: The only undies with a built-in pocket sized for rae. Pick Light-Moderate or Moderate-Heavy. PFAS-free and independently lab tested.

✨ All-Over Daily Cleanser: pH-balanced and hydrating. TLC for your bits and beyond. 250ml.

✨ Mesh Laundry Bag: Keeps the elastic honest and your undies away from somebody else's zip.

Easy Care, Zero Fuss

✨ rae Wearable Heat Pad: Pick your setting, low (5+ hrs), medium (around 3 hrs) or high (around 2 hrs). Charges in around 90 minutes via USB-C. Wipe with a damp cloth, do not submerge. Not for use while sleeping.

✨ Period Pocket Undies: Rinse in cold water until clear, then machine wash cold with mild detergent. Avoid bleach and fabric softener. Line dry or tumble dry on low. Use the mesh bag.

✨ All-Over Daily Cleanser: External use only.

Materials & Composition

✨ rae Wearable Heat Pad: Food-grade hypoallergenic silicone, curved and winged, about 270g. IP54 splash-proof, certified RoHS and RCM.

✨ Period Pocket Undies: 95% organic cotton and 5% elastane, with multi-layered moisture-wicking. PFAS-free and independently lab tested.

✨ All-Over Daily Cleanser: pH-balanced and hydrating, made for sensitive skin.

Planet-Friendly Practices

By choosing Scarlet, you're making a sustainable choice for your self-care routine and the planet. Our products are designed to reduce waste, promote reuse, and incorporate the cleanest ingredients and eco-friendly packaging.

✅ Reusable Options: From our underwear to our rae Heat Pad, we provide better sustainable, reusable period self-care options.

✅ Eco-Conscious Ingredients: We find the best ingredients/product components free from harmful chemicals.

✅ Recyclable Packaging: Designed to minimise waste.

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

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$175.00 ~~$201.00~~

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

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

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.

Why does rae cost $129?

You're paying for premium build, not a gimmick: up to 50°C on high, 5+ hours on the low setting, USB-C rechargeable, and something built to last years instead of one disposable pack at a time. It's a one-off cost replacing an ongoing one.

When should I use rae?

As early as possible is best. Pop rae on at the first sign of your period or the first twinge of discomfort, rather than waiting until the cramps have properly set in. Heat works best as a head start, not a rescue mission.

How long does the battery last?

Battery life depends on your heat setting, but generally:
• Low: 5+ hours
• Medium: up to 3 hours
• High: up to 2 hours

Does it get really hot?

rae has three heat settings so you can choose your level of warmth. The highest setting reaches up to 50°C for stronger, more targeted heat.

Won’t rae just fall out of my pants?

Nope, because we’ve come up with a genius solution. Meet our Period Pocket Underwear: a customised version of our best-selling period underwear with a little pouch for the device, perfect for when you’re on the move.

Attached to your regular undies? No problem! Wear rae between your underwear and clothing. If using it directly on the skin, stick to a lower heat setting.

★★★★★

“Say goodbye to clunky hot water bottles and hello to rae, Scarlet’s game-changing, wearable, wireless heat device.”
- Sitchu

★★★★★

“rae gave the perfect amount of heat… Being able to change settings was a game changer because it felt safer and more comfortable.”
News

★★★★★

"A wearable, wireless heat device that’s far more practical than clutching a hot water bottle is pure genius."
Body & Soul