Period Underwear

Period underwear that actually holds up. PFAS-free, independently lab tested, super light to heavy. Wash it with everything else, wear it for years. Designed in Australia.

New to undies? How period underwear works · Washing and care

Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage

Period Boyshort

Heavy flow. Full coverage. No leaks.

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$30.00
Scarlet Period Bikini Brief - Available in Light & Moderate
Scarlet Period Bikini Brief - Available in Light & Moderate

Period Bikini Brief

Light to moderate. Easy daily coverage.

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$26.00
Scarlet Period High-Waist Brief
Scarlet Moderate Flow Period High-Waist Brief – Full Coverage, Comfortable

High-Waist Period Brief

Moderate flow. Secure, no shifting.

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$28.00
Scarlet Period Invisible Thong | Like a panty liner, PFAS-free, Soft with 360° stretch
Scarlet Period Invisible Thong | Like a panty liner, PFAS-free, Soft with 360° stretch

Period Invisible Thong

Ultra-light. Barely there protection.

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$22.00
Scarlet Period G-String | Leakproof, Light Absorbency, PFAS-free, Organic Cotton
Scarlet Light Flow Period G-String – Leak-Free, Comfortable Protection

Period G-String

Tight pants approved. Periods included.

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$24.00
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.

High-Waist Pocket Period Brief

Available in Light and Moderate

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$26.00
Scarlet Period The First Flow Kit
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Save 13%

First Flow Kit

Mix and match for your flow.

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$129.00 $148.00
Scarlet Period The Heavy Days Bundle | PFAS-free Boyshort & High-Waisted Brief
Scarlet Period High-Waisted Brief | Leakproof, PFAS-free, Moderate Absorbency
Save 12%

Heavy Days Set

Built for heavy days and longer nights.

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$45.00 $51.00
Scarlet Period Boyshort | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag
Scarlet Heavy Flow Period Boyshort – Organic Cotton, Full Coverage
Save 14%

3-pack Period Boyshort

Heavy days sorted. Fewer washes needed.

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$76.00 $88.00
Scarlet Period High-Waisted Brief | 3-Pack + Laundry Bag
Scarlet Period High-Waisted Brief | Leakproof, PFAS-free, Moderate Absorbency
Save 7%

3-pack Period High-Waist Brief

Reliable moderate coverage. Ready every cycle.

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$79.00 $85.00
Scarlet Period Bikini Brief | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag
Scarlet PFAS-Free Period Bikini Brief – Stylish, Leak-Proof, Organic Cotton
Save 16%

3-pack Period Bikini Brief

Three pairs. Your flow, your way.

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$69.00 $82.00
Scarlet Period G-String | 3-Pack Leak-proof PFAS-free underwear + Laundry Bag
Scarlet Light Flow Period G-String – Leak-Free, Comfortable Protection
Save 11%

3-pack Period G-String

Light days covered. No rotation stress.

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$68.00 $76.00
Scarlet Period Invisible Thong | 3-Pack + Bag | Super Light Absorbency
Scarlet Period Invisible Thong | Like a panty liner, PFAS-free, Soft with 360° stretch
Save 11%

3-pack Period Invisible Thong

Made for those "just in case" days.

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$62.00 $70.00
Scarlet Period The Sultry Days Set | Period G-String & Invisible Thong
Scarlet Period G-String | Leakproof, Light Absorbency, PFAS-free, Organic Cotton
Save 19%

Sultry Days Set

Tight pants. Light flow. Sorted.

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$34.00 $42.00
Scarlet Period Sleep Easy Bundle
Scarlet Period Boyshort – PFAS-free, Heavy overnight absorbency, Organic Cotton
Save 17%

Period Sleep Easy Bundle

Sleep through cramps. No wake ups.

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From $60.00