Period Full Brief

$39 $35.10

Low as $31.20

Anti-Bulk Tech
12hr Protection
Hypoallergenic
Anti-Odour
Women's Period Full Brief - Bamboo Underwear - Model:Armani
Women's Period Full Brief - Bamboo Underwear
Women's Period Full Brief - Bamboo Underwear - Model:Armani
Women's Period Full Brief - Bamboo Underwear - Model:Armani
Women's Period Full Brief - Bamboo Underwear - Model:Armani
Women's Period Full Brief - Bamboo Underwear - Model:Armani
Women's Period Full Brief - Bamboo Underwear - Model:Chloe
Women's Period Full Brief - Bamboo Underwear - Model:Chloe
Women's Period Full Brief - Bamboo Underwear - Model:Chloe
Women's Period Full Brief - Bamboo Underwear - Model:Chloe
Women's Period Full Brief - Bamboo Underwear - Model:Chloe
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Anti-Bulk Tech
12hr Protection
Hypoallergenic
Anti-Odour

Period Full Brief

$39 $35.10

Low as $31.20

Select Style

Thong Bikini Brief Full Brief

Colour:

Select Absorbency

Only available in Thong

Select Quantity

Select Size

4
Free Shipping
30-Day Guarantee
Over 2M+ Happy Customers

Our Heavy Flow Full Brief is the powerhouse of the range. With extended absorbency through the back, this style is designed for overnight wear or heavy flow days. Supportive, breathable, and bulk-free, it gives you maximum protection while still feeling like your favourite Step One briefs.

  • Extended absorbency area
  • High-waisted, low-leg finish
  • Maximum coverage and confidence
  • Slim 2-layer core that’s fast drying
  • FSC-certified bamboo viscose outer
Main fabric: 95% viscose (bamboo), 5% elastane
Inside gusset layer: 100% merino wool
Absorbent layer: 70% polyester, 30% cotton with TPU laminate
If you usually wear a Small in our SmoothFit line, we suggest selecting a Medium in the Period Underwear. The fabric is less stretchy due to its absorbent construction, so a larger size may offer a more comfortable fit. However, if you prefer a snugger feel, your usual size will still work.

We aim to dispatch your order 1-2 business days after placing your order.

Free shipping, no minimum spend.

GENERAL SHIPPING TIMES:

NSW, VIC & QLD = approx. 1-3 business days after dispatch.

WA, NT, TAS = approx. 2-4 business days after dispatch.

We offer international shipping to selected countries, which is shown at checkout. International shipping may vary based on local fulfilment.

We are so confident you'll love your Step Ones, we'll give you a FULL REFUND on your FIRST PAIR if you don't like them for whatever reason.

Comfort First

At Step One, we make products inspired by real life, embracing the ethos of Comfort First. We believe protection is about freedom and being present.

Same Thickness

Our revolutionary technology keeps the same ultra-thin profile across all absorbency levels.

Max Absorbency

Engineered to handle heavy flows without the bulk of traditional pads or thick underwear.

Anti-Leak

Multi-layered protection that locks in moisture and prevents leaks, all day and night.

Soft & Breathable

Made from breathable and soft bamboo viscose. Naturally hypoallergenic and anti-bacterial.

First
26M+
Pairs Sold
65K+
5-Star Reviews
2M+
Happy Customers

The traditional approach* is bulky.

Zero bulk, all protection. The same comfort from light to heavy days.

Feature Other Brands*Step One™
Same thickness for all absorbency levels
Ultra-thin, invisible under leggings
Quick-dry technology
Stays dry and comfortable

*Traditional brands increase the thickness of the absorbent layer as capacity goes up — bulky, visible under clothing, slow to dry and damp-feeling. Our patented technology keeps a consistent, ultra-thin profile regardless of absorbency level.

Trustpilot

Trust Score 4.5/5

Real Results from Real Customers
Community

Real people, real flow.

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@stepone.life
30 Days

First Pair Guarantee

Love them or they're free. If you don't love your first pair, we'll give you a full refund.

Risk-free trial
Full refund

Frequently Asked Questions

Our absorbent core is engineered to be ultra-slim rather than ultra-thick. We use high-performance technical fabrics that are highly absorbent without the bulk of traditional pads or thick underwear.
Yes! Our heavy absorbency pairs are designed for up to 12 hours of wear, depending on your flow. The quick-dry top layer ensures you stay feeling dry and fresh throughout the day.
It's simple: rinse in cold water until the water runs clear, then toss them in a cold machine wash (no fabric softener!). Hang to dry.
We recommend sizing up if you're between sizes for maximum comfort during your cycle. Our fabrics have 4-way stretch to move with your body as it changes throughout the month.
We are so confident you'll love your Step Ones, we'll give you a FULL REFUND on your FIRST PAIR if you don't like them for whatever reason.