KNOW YOUR FLOW
Absorbency Guide
Our Teen Orgaknix™ Super Bikini – Heavy Flow & Overnight Period Underwear has a Super absorbency.
Check out the below guide to see how this level stacks up against our other products.
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Teen Orgaknix™ Super Bikini – Heavy Flow & Overnight Period Underwear
●●●●● | Super - Check out our absorbency guide here
Heavy days and overnights — she's got this.
The Teen Orgaknix Super Bikini is built for heavy flow and overnight protection. Super absorbency holds 30–40ml (equivalent to 6–8 tampons) with a full-length gusset from front to back waist seam — so she's covered no matter how she sleeps or moves.
Certified organic cotton next to her skin. No chemicals, no PFAS, no compromise.
Sizes: Girls 8–18 / Ladies 6–14. See the size guide for full measurements.
Why she'll love it:
- Holds 30–40ml — heavy flow and overnight protection
- Full-length gusset front to back waist seam — side, tummy, and back sleepers covered
- Certified organic cotton skin-contact layer — PFAS-free and chemical-free
- 4-layer EcoTech technology — absorbent, leak-proof, moisture-wicking
- Bikini cut — comfortable, familiar fit
- Available in Black and Beige
Organic cotton | Holds 30–40ml | PFAS-free | Girls & Ladies sizes | Overnight wear
Fabric Composition: Organic cotton outer fabric and against the skin. Invisible inner layer of cotton against the skin Absorbent and leakproof gusset with a moisture wicking layer against the skin
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ECO-FRIENDLY PRODUCTION
Organic cotton next to skin, so it's gentle all day and night.
Holds up to 40ml, covering heavy days and overnight without backup.
Four built-in layers draw moisture away and lock it in, no leaks, no bulk, nothing to adjust.
PFAS-free and free from harmful chemicals, made to a standard you'd want against your daughter's skin.
Machine washable and built to last years, not months.
Sized for teens, with a range of fits across the Super Bikini, Brief and Boyshort styles.
When your undies arrive, have her try them on over clean regular underwear before use to check the fit. Give them a wash before the first wear to activate the absorbency.
Then simply wear them like any other underwear. How long she wears them will depend on her flow. We recommend changing every 6-12 hours.
Step 1 Wash your Eco Period underwear before wearing / using them. This activates the EcoTech and primes it for use.
Step 2, After wearing, rinse in cold water until the blood/ fluids are mostly removed. You can do this in the shower to save water, but just do it before the water heats up past 30 degrees, as heat will set stains into the fabrics.
Step 3. Pop your undies into a delicates wash bag and into the washing machine on a cold wash. Use a liquid natural detergent.
No fabric softeners.
Step 4. Hang dry on the line outside. Line drying is best as it is kinder to the fabrics. Just don't leave them out on the line for days.
Eco Period underwear should NEVER:
Be cleansed with harsh detergents (these abrade and break down clothes which shortens their effectiveness and lifespan)
Be cleansed with fabric softeners (it's like fabric cholesterol and blocks the pathways in the fabric through which the liquid travels)
Be bleached (bleach kills everything, need we say more)
Be dry cleaned (putting the products into such a harsh environment with or without the added chemicals is bad)
Be washed in very hot water (heat breaks down the fibres and natural compounds that make these products so effective.
You might like to add
$9.90
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 DAUGHTER'S FIRST TIME WITH PERIOD UNDERWEAR?
Most girls never go back to pads and tampons. Here's everything you need to know.
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The Teen Orgaknix Super Bikini is a bikini-cut brief at 40ml capacity. The Boyshort is a relaxed short-style fit, also for heavy days and overnights, with a capacity of 40ml.
The Teen Orgaknix Brief is fuller coverage at 30ml, better for moderate days or lighter overnight flow.
If you're not sure where to start, the Super Bikini or Boyshort are the most popular first purchases.
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Yes. All our teen styles are designed to be worn solo through a full school day.
The Super Bikini and Boyshorts hold up to 40ml for heavy and overnight flow, and the Briefs hold up to 30ml, which suits moderate to regular days.
Most girls wear one pair through the day without needing to change. If she's new to period underwear and wants extra confidence while she finds her feet, she can wear it with a backup pad (we recommend Eco Pads) until she trusts it.
Take a look at our Know your Flow page to learn more. -
Rinse in cold water after wearing, then machine wash on cold with her regular clothes.
No hot water, no fabric softener, hang to dry. They don't need to be washed separately.
Simple routine, and it takes about 30 seconds to rinse before they go in the wash.
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With proper care, years. Our staff and some of our long term customers have been wearing theirs for over five years.
The organic cotton stays soft and the absorbent layers don't break down with regular washing the way disposables would if they were reusable (they're not, but you get the idea).
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Yes, that's one of the best uses for the Super Bikini. The 40ml capacity is designed with overnight wear in mind. . Many mums buy two pairs specifically for overnight use.
Yes. The Super Bikini and Boyshorts Teen Brief are both popular choices for overnight wear, with 40ml capacity designed with that in mind.
The front to back gusset covers tummy sleepers, side sleepers and if she sleeps on her back.
Many mums buy two pairs specifically for nights.
The Teen briefs works well for lighter overnight days.
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Honestly, most girls forget they're wearing them within the first hour. They feel like normal underwear.
The main adjustment is trusting that they're working, which usually happens after the first successful wear. Start on a lighter day at home so she can build her confidence before wearing them to school.
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Check the size guide on this page. If she's between sizes, go up one.
The organic cotton fabric has a small amount of natural give, and a comfortable fit means she'll actually want to wear them. Tight underwear on heavy days is nobody's friend.
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Yes. Eco Period underwear is PFAS-free and free from harmful chemicals.
Organic cotton is one of the gentlest fabrics you can put against skin. These are made to the same standard we'd want for our own daughters.
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Yes. Some girls use them as backup while they're building confidence, especially at school.
Others go solo from day one. There's no wrong way to start.
Think your individual decisions won't make a difference? Think again.
The average women uses 11,000 pads, tampons and pantyliners in their lifetime.
That's a lot of landfill! It's time to make the switch to Eco Period Australia - you won't look back.
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 seams, 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.
All cotton in our products is organically cultivated and comes from suppliers who are inspected and certified as part of the Control Union Certification program. This organization has established criteria for organic production according two certification programmes, GOTS or Organic Exchange Certification. Read more about Control Union here. Organic cotton is cotton grown without any chemical fertilizers or pesticides which is better for human health as well as nature. The organic cotton is different from conventional cotton in many respects, and the difference starts at the fibre stage.
The textile industry has historically been associated with environmentally harmful processing, animal welfare issues, and complex social compliance issues such as child labor, workers’ wages, benefits, fast fashion and health and safety. The demand for certified, sustainable products is growing rapidly. Eco Period works with manufacturers that use Control Union Certified certified organic, recycled and sustainable materials.