Multi-flow
Holds 4 tampons' worth
Leakproof up to 8 hours
95% organic bamboo
OEKO-TEX certified, PFAS-free
Built-in heat pack pocket
Warmth where cramps live
Lasts 2+ years
Saves $300+ a year
Shop by flow
Start with how your heaviest day actually feels. We'll match you to the right absorbency from there.
Only from Flow
Heat, slip it in, breathe out.
Every other brand stops at absorbency. The Pocket Brief holds up to 4 tampons' worth and carries a lavender wheat heat pack in a discreet front pocket, so the pain gets treated while you're protected.
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1
Heat the lavender wheat pack
30 seconds in the microwave is all it takes.
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2
Slide it into the discreet front pocket
It sits flat and stays put, invisible under clothes.
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3
Warmth exactly where cramps live
Around 40 minutes of steady heat across your lower abdomen.
More pairs, lower price
Most people need 3 to 5 pairs to go fully reusable.
2,400+ women, one less thing to worry about
4.8 out of 5 · 2,400+ reviews
Game changer for heavy nights
I was sceptical about period underwear but these are genuinely comfortable. No leaks on my heaviest night and the heat pack is a bonus.
Sarah M. Verified buyer
Pocket Brief · Mar 2025
So much better than pads
The bamboo is incredibly soft and I love that there's no plastic crinkle. Feels like normal underwear.
Jessica L. Verified buyer
Everyday Brief · Feb 2025
The heat pack is genius
I have endometriosis and the heat pack pocket is the reason I bought these. Total game changer for cramp days at work.
Emily R. Verified buyer
Pocket Brief + Heat Pack · Jan 2025
Woman-led, Melbourne designed.
Flow started because our founder was tired of choosing between a hot water bottle on the couch and getting through the day. She spent two years developing a bamboo brief that could hold a full day and carry heat where the pain actually sits.
Everything is designed here, tested on real cycles, and sent out in plastic-free packaging.
Our storyWhat a swap actually saves
Up to 240
pads and tampons diverted from landfill per customer, every year.
100% plastic-free
packaging, from the mailer to the care card and the tape.
Around a third
of the water cotton needs, because bamboo grows without irrigation.
The questions everyone asks
The Pocket Briefs hold up to 4 tampons' worth and stay leakproof for up to 8 hours. The Thongs hold up to 1 tampon's worth.
No. The top layer wicks moisture away in seconds and the bamboo core locks it below the surface, so the fabric against your skin stays dry.
Rinse in cold water until it runs clear, then machine wash cold on a gentle cycle with your normal load and hang to dry. No fabric softener, no dryer.
Everyone's favourites
Shop all
Multi-flow
Light – Moderate
Multi-flow
4.67 (3)
5 Pack - Fern Lace High Waisted Pocket Brief + Botanical Heat Pack
$126.75$169.00 Save $42.25
Multi-flow
5.0 (1)
5 Pack - Organic Bamboo High Waisted Pocket Brief + Botanical Heat Pack
$126.75$169.00 Save $42.25
Tag @flow.intimates
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Your period, upgraded.
Join 2,400+ Australians who made the swap to organic bamboo comfort and lavender infused botanical cramp relief.
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Take $10 off your first order.
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Organic Period Underwear
Finally, protection you'll forget you're even wearing.
4.8 stars · 2,400+ happy customers
Leak-proof for up to 8 hours
Holds 4 tampons worth — through sleep, sport & everything in between
95% Bamboo — naturally odour-free
OEKO-TEX certified. No toxins, no smell, no compromise
Built-in heatpad for cramp relief
The only period underwear that soothes while it protects
Machine washable — lasts 2+ years
Saves $300+ vs disposables. Better for you & the planet
Shop Now - from 28$
30-day free returns
🌿 Plastic-free packaging
✈️ Free AUS shipping over $100
♻️ Toxin-Free
Made With 95% Bamboo
Heatpad Included
Non-toxic
Planet Friendly
Made With 95% Bamboo
Heatpad Included
Woman-led
Planet Friendly
Made for Your Flow
The Flow Bundle
Crafted from soft organic bamboo and cotton layers, it blends reliable leakproof protection with delicate lace detailing for a touch of everyday luxury. Inside, a discreet pocket is made to hold our botanical heat pack, giving you gentle natural warmth to ease cramps and tension whenever you need it.
SHOP NOWFlow Intensity
The High Waisted Bundle
Organic Bamboo Leakproof High-Waisted Pocket Brief is a comfort essential designed for peace of mind on your medium to heavy flow days. With a flattering high-waisted fit and buttery-soft organic materials, it moves with your body/
SHOP NOWFlow Intensity
The Lace Thong
Crafted from soft organic bamboo fibre, it combines breathable comfort with delicate lace detailing for a minimal, flattering fit. This thong gives you light leakproof protection that feels barely there while keeping you fresh and supported all day.
SHOP NOWFlow Intensity
The Fern Lace
Elegance meets comfort with our Fern Lace Leakproof High Waisted Pocket Brief, designed to help you feel confident, feminine, and supported through every flow. Crafted from soft organic bamboo and cotton layers, it blends reliable leakproof protection with delicate lace detailing for a touch of everyday luxury.
SHOP NOW
