Scarlet Period Boyshort | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Underwear Laundry Bag | Lightweight mesh delicates washing bag
Scarlet Period Boyshort | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Period Underwear Laundry Bag | Lightweight mesh delicates washing bag

3-pack Period Boyshort

Heavy days sorted. Fewer washes needed.

$76.00 $88.00

The Scarlet Period Boyshort 3-Pack provides unbeatable comfort and leak-proof protection for heavy flow days.

    Heavy Flow Absorbency
    Organic Cotton Softness
    PFAS-Free & Toxin-Free
    Save $$ with Sets
Scarlet Period Boyshort (Size)
Period Cup
Upgrade your order
Make the switch to a reusable medical grade silicone Period Cup
+$15.40 $22.00
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✨ Full Coverage Protection: Comfort and confidence with full coverage for heavy flow days.

✨ Absorbency for Heavy Flow: Holds up to 7 teaspoons of fluid (equivalent to 4 regular tampons or 3 pads).

✨ Soft, Breathable Organic Cotton: Made from GOTS Organic Cotton that feels like your favourite undies.

✨ Leak-Proof Gusset: Quick-drying gusset keeps leaks at bay.

✨ Value-packed: Save with our 3-pack of our best-selling style, with a laundry bag to boot.

✨ Rinse in Cold Water: After wearing, rinse in cold water until it runs clear to keep them fresh.

✨ Machine Wash Cold: Toss them in with mild detergent (no bleach or fabric softener, please).

✨ Dry with Ease: Line dry or tumble on low - no need for extra care.

✨ Need more info? Please read our complete guide to caring for your period underwear here.

✨ Soft & Breathable Feel: Made with 95% GOTS-certified Organic Cotton for natural softness and airflow.

✨ Flexible Fit: 5% Spandex adds gentle stretch for comfort that moves with you.

✨ Quick-Dry Gusset: Built-in Polyester/PUL gusset locks in leaks and dries fast to keep you feeling fresh.

✨ Free from Nasties: No added chemical treatments, including PFAS (independently lab tested).

✨ 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.

✨ 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.

Size Chart

Size chart for 3-pack Period Boyshort
Scarlet Period Boyshort | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag

3-pack Period Boyshort

$76.00 $88.00
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Scarlet Period model wearing Boyshort

Designed for days when even sneezing feels disastrous

Is there anything cuter than your butt in The Boyshort? (Hypothetical question.)

Our best-selling, full-coverage Boyshort has high absorbency for overnight and heavy-flow days. It is made with soft, breathable fabric for less sweat, more comfort, and movie marathons on the couch.

  • Zero leaks, zero worries
  • Super soft GOTS Certified Organic Cotton
  • Absorbs the equivalent of 4 tampons or 3 pads
  • Chemical treatment-free, including PFAS
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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 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.

Do I need to wear a cup, tampon, or pad 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 or tampon.

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

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 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.

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.
★★★★★

"The Boyshort gives you more coverage for those days you feel a bit more vulnerable to leakage or overnight."

Body and Soul

★★★★★

"The organic cotton is super soft, and I feel super secure to wear these even on heavy days. Highly recommend!"

NEWS

★★★★★

"I was walking, catching up with friends and going to Pilates. All without a leakage scare in sight."

Beauty Heaven

Real advice for real cycle days