KNOW YOUR FLOW
Absorbency Guide
Our Tankini 3 Piece Set - Ladies have a absorbency.
Check out the below guide to see how this level stacks up against our other products.
Tankini 3 Piece Set - Ladies
| - Check out our absorbency guide here
60 Day Risk Free Trial
3-Piece Period-Ready Tankini Set
One top. Two bottoms. Total swim freedom.
This is the tankini set designed for real life — holidays, pool days, beach walks, and those moments when your cycle doesn’t stick to the plan.
Our 3-Piece Tankini Set gives you choice, flexibility, and peace of mind — all in one beautifully coordinated swim set.
What’s included:
💙 Teal/ Floral Tankini Top
A sleek, supportive tankini top with a flattering scoop neckline and wide straps for comfort and confidence. Longline coverage means you can swim, stretch, and move without constantly adjusting.
🌿 Printed/ Block Colour High-Waist Bikini Bottom (Standard Swim)
A classic high-waist swim bottom in a fresh tropical leaf print or pretty sky blue— perfect for non-cycle days. Smooth, secure, and designed to sit comfortably on the body without digging in.
🖤 Black High-Waist Period Swim Bottom
Your secret weapon for swimming on your period. Discreetly absorbent and designed to hold light–moderate flow, so you can swim without tampons or pads. Looks just like regular swimwear — feels anything but stressful.
Why you’ll love it:
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Two bottoms = complete flexibility depending on your cycle
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High-waist fit for comfort, coverage, and gentle tummy support
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Period-proof swim technology in the black bottoms
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Tankini top offers more coverage without sacrificing style
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Ideal for travel — one set, all situations
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Reusable, considered, and designed to last
Sizing & availability:
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Limited release sizing: AU 10–16 (M–XL)
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Extended sizing: XS–6XL available via special order
(If your size isn’t listed, just reach out — we’re happy to help.)
This is swimwear that adapts to you — not the other way around.
Because your period shouldn’t stop beach days, pool sessions, or spontaneous swims.
✨ Limited release. Once they sell out, we may not restock.
Tankini Size Guide (AU Sizing)
All measurements are body measurements in centimetres.
Tankini styles are designed to be more forgiving through the waist and midsection.
| AU Size | Bust (cm) | Hip (cm) | Waist (cm) |
|---|---|---|---|
| XS/6–8 | 79–84 | 86–91 | 60–67 |
| S/8–10 | 84–89 | 91–97 | 65–72 |
| M/10–12 | 89–94 | 97–102 | 70–77 |
| L/12–14 | 94–99 | 102–107 | 75–84 |
| XL/14–16 | 99–105 | 107–113 | 84–93 |
| 16–18 | 105–112 | 113–118 | 90–98 |
| 18–20 | 112–118 | 118–123 | 95–103 |
| 20–22 | 118–123 | 123–128 | 100–108 |
| 22–24 | 123–128 | 128–133 | 105–113 |
| 24–26 | 128–133 | 133–138 | 110–118 |
Fit tips:
• Designed for comfort through the waist and tummy area
• Bust and hip should be your primary size reference
• If between sizes, choose your usual AU size for a relaxed fit or size down for a firmer fit
What's to love about our Tankini 3 Piece Set - Ladies?
When your undies arrive, try them on over your regular, clean underwear before use to check the fit. Make sure to give them a wash before your first wear to improve the absorption performance.
Then to use the undies, simply wear them like you would with any of your other underwear.
How long you wear your underwear for will come down to personal preference and your flow. We recommend changing every 6-12 hours.
Washing period undies and period bikinis/ swimwear is simple and hassle-free.
They can be machine-washed (we recommend using a garment bag, cold water and liquid natural detergent), and then line-dried for best results.
We do recommend rinsing them well prior to popping them in the machine, however this isn't necessary.
Think your individual decisions won't make a difference?
Well, did you know more than 12 BILLION pads and tampons are thrown out every year worldwide? Let's break this down even further to see the impact you CAN make - the average woman alone uses 11,000 pads, tampons and panty liners in their lifetime. That’s a lot of landfill! It's time to make the switch to Eco Period, you won't look back.
IS IT YOUR FIRST TIME TRYING REUSABLE PERIOD CARE?
Once you start, you'll never go back to traditional single-use period care products again!
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Eco Period Australia underwear absorb your period.
Every pair is made with our signature technology that's odor-controlling, super-absorbent, and leak-resistant. This 4 layer technology works together to do it’s thing (aka keep you fresh and dry). Take a look at our How It Works page to learn more.
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Yes, our period underwear has been designed to be worn alone, with no tampons or pads required. If you wish to wear a menstrual eco cup as well, this can extend the wear time of your eco briefs.
Also the length of time you can wear each pair depends on your flow.
As a general rule, we recommend choosing heavy or super absorbency for your heavy flow days and moderate or light for your lighter days.
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This comes down to personal preference and your flow, however you can wear a pair of undies for as long as 24 hours. We find most of our customers like to change every 8-16 hours. There's no right or wrong here!
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Our range of period underwear range from Super > Light. Scroll down to check out our Absorbency Guide here to decide which level is right for you.
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Firstly, work out how many days of your cycle are heavy and moderate/light. Then, you can calculate the number of briefs you will need using this guide:
Heavy flow days:
- Within a 24 hour period, we'd recommend changing 2-3 times.
- Suggested change times - morning, midday (optional if your flow is heavy) and at the end of the day.
Moderate/light flow days:
- Within a 24 hour period, we'd recommend changing 1-2 times.
- Suggested change times - morning and at the end of the day.
So you can allow ample time for washing + drying, we suggest buying double the amount you calculate above, so you're never caught out without a clean pair to wear!
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If you use period cups or pads you might not need as many pairs of period underwear.
Browse our collection of eco-pads and menstrual cups to grow your eco-friendly period solutions.
If you're often on the move and wish to change your underwear, we recommend getting a wetbag for your used underwear to store them before you're able to wash them.
WHO WE ARE
Eco Period offers beautifully crafted, quality period garments that are made to last, and are just as good for your body as they are for the environment.
We are passionate about making a difference through our products and hope to help you transition (or continue) your journey towards zero waste, eco and organic period solutions.
SUPER
●●●●● 30-60ml
The lining is thicker and extends to the back waist seam, so it covers you for overnights.
HEAVY
●●●●○ 25-40ml
Choose Heavy absorbency if you have a heavy flow or for your heavy flow days or for moderate incontinence.. The lining extends to the back waist seam, so it covers you for overnights or when laying down on your side and back.
MODERATE/HEAVY
●●●○○ 20-30ml
Perfect to use if your flow is moderate, so think 3rd or 4th day of your period. Also for light to moderate incontinence leaks. These undies will also cover you at night as the leakproof lining extends up to the back waist seam (a thinner layer than the heavy absorbency).
MODERATE
●●○○○ 15-20ml
Choose Moderate absorbency for day-time wear, active wear and for when you just don't need that extra panel of protection up the back. Suitable for flows from 15-25 ml. The lining is generally a little thinner too, so does not feel bulky.
LIGHT
●○○○○ 10-15ml
If your flow is light, or you are using as a backup, choose light absorbency. This will provide a leakproof function and some absorbency as a backup.
