Scarlet | Period Underwear

Period underwear that pulls its weight. Six styles from super light to heavy, sizes 6 to 18, all PFAS-free and all independently lab tested. So soft, you'll forget you're wearing them.

Heavy flow. Full coverage. No leaks.

Light to moderate. Easy daily coverage.

Moderate flow. Secure, no shifting.

Ultra-light. Barely there. Zero lines.

Tight pants approved. Periods included.

Leak-free basics to start with confidence.

Built for heavy days and longer nights.

Tight pants. Light flow. Sorted.

Six styles, because day two and day five are not the same animal

The Boyshort for the nights you'd otherwise lie there doing risk assessment, the Invisible Thong for the day you're only guessing, and four more in between. Super light through to heavy, sizes from 6, up to 18 in selected styles, all PFAS-free and all independently lab tested. Cut flat enough that nothing shows through anything, which is the bit most brands skip.

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Which pair, and will it actually hold

The honest version. The Invisible Thong takes spotting and sweat, under a tampon's worth. The G-String and Bikini Brief handle light days at around two. High-Waist and Pocket Brief sit at moderate, around three. The Boyshort takes heavy and overnight at around four. Sizes from 6, up to 18 in selected styles.

Do they feel like a nappy

No. That was the entire design brief. Multi-layered leakproof technology, a quick-drying gusset, cut to sit flat under jeans. Most people end up wearing them when they're not bleeding, which is the real test.

What are they made of

Composition varies by style and it's on every product page. The High-Waist Brief is 45% modal and 45% cotton with 10% spandex. The Pocket Brief is 95% organic cotton and 5% elastane.

What PFAS-free actually means

No per- and polyfluoroalkyl substances. Plenty of brands say PFAS-free. We independently lab test every style to be sure, because we're OTT like that. Worth knowing: it's not the same as chemical-free, which is a phrase that means nothing.

How do I wash them

Cold rinse until the water runs clear. Cold machine wash, mild detergent. No bleach, no softener, no drama. Line dry. Two years, easy.

What if they don't work for me

Thirty days, risk free, first pair, first-timers. Nobody can tell which style suits them from a photo, so we'd rather you found out on us.