The service and communication was excellent. The Quality of the underwear beautiful and material is so soft and beautiful. They work as described. Highly recommend ShineSister to anyone.
Seamless Cindy-Bikini Cut
Seamless Cindy-Bikini Cut
Regular price
$29.95
Regular price
$29.95
Sale price
$36.95
Unit price
per
Light Absorbency
Up to 8 Hours of Protection
100% Leak-proof Design
Breathable Cotton Spandex
Reusable, Reliable 100+ Washes
Perfect Fit Guarantee
Couldn't load pickup availability
I was skeptical at first, but these undies have changed my life! So comfortable and absorbent, I don't have to worry if I leak a little anymore. ~ Irene. From Sydney
Description
Description
The Seamless Cindy Bikini Cut is a low-rise, seamless knicker that offers light leak-proof protection and a sleek, breathable design. Perfect for under tight clothes or when you need an invisible panty line, these knickers keep you comfortable and fresh all day with moisture-wicking and odour-locking properties. Machine washable for convenience, they provide the perfect blend of comfort, protection, and style – effortlessly.
Material
Material
Made with:
Outer: 95% cotton / 5% spandex
Inner: 80% polyester / 20%Nylon / 100% polyester / breathable TPU
Absorbency
Absorbency
Care
Care
BEFORE YOU WEAR
Wash before use to activate the absorbency layers. In a wash bag is always best.
AFTER USE
Rinse in cold water after use, until water runs clear.
Don't leave wet for too long before washing
Do not soak.
COLD WATER WASH
Machine wash in cold water with like colours. In a wash bag is always best.
Avoid fabric softener, bleach or harsh chemicals.
HANG TO DRY
Line dry in the shade. Peg outside the absorbency area.
Do not tumble dry, dry clean or iron.
Sizing
Sizing
Sizes are displayed in Australian/UK sizes, please refer to the size guide for international tag sizing.
Please check the size guide above, if you are still unsure on size or style, please reach out to our customer service team for advice.
*Please note sizes may vary 1-2cm.
The Magic Behind the Comfort
Our No Worry Knickers are powered by clever design and cutting-edge 4 layer leak-proof technology. With multiple absorbent layers that wick away moisture and lock in odours, these knickers keep you dry, fresh, and leak-free – no matter what your day throws at you!
Inner Stay Dry Layer
Absorbs liquid, wicking away in seconds, leaving them dry to the touch.
Ultra Absorbent Layer
Absorbs and locks in moisture and odours
Leak-proof Membrane
Breathable and non toxic TPU membrane
Outer Layer
Dry, breathable, soft, stretchy and look just like regular knickers.
Featured In
It Just Makes Sense
We could't possible list all the reasons why our knickers are the better solution, here are three good ones
| ShineSister Knickers | Pads / Tampons | |
|---|---|---|
| Secure | ||
| Eco-friendly | ||
| Affordable |
How you can make an Impact
Protect Yourself, Protect the Planet
Switching to leak-proof knickers is a simple way to reduce waste and lessen your environmental impact, all while enjoying reliable protection and comfort every day.
Life-Changing Comfort, In Their Words
Loved by 15,000+ Women and Counting
Our Leak-proof Knickers are NOT nappies
Promise: Just like your favourite knickers only smarter. Our ultra-thin, flexible leak-proof gusset is designed to feel discreet and comfy, never bulky, so it moves with you and keeps you dry without you noticing a thing.
Why 9 Out 10 ShineSister's Keep Coming Back
98%
98% of ShineSisters say they trust our knickers to keep them dry and protected, no matter the day, flow, or situation.
96%
96% say they love the feel, the look and the all day comfort, with our soft, breathable fabric and high quality tailoring.
93%
93% felt better about not using disposables anymore, dignity restored, planet supported and money saved.
It's Our Promise to You
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Reliability
Advanced leak-proof technology that delivers protection day and night. Just pop them on and go!
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Sustainability
Reusable, eco-conscious, and free from harmful chemicals. Better for you, and better for the planet.
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Functionality
Flattering fits, and all-day wearability, because comfort and style shouldn’t stop at support.
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Gurarntee
If your first pair isn’t the perfect fit, we’ll refund or replace it, no fuss, just support you can trust.
FAQ's
How do leak-proof knickers work?
How do leak-proof knickers work?
Our knickers use advanced multi-layer technology to absorb liquid, lock in odours, and keep you feeling dry. The top layer wicks moisture away, while the built-in absorbent core holds leaks securely—without feeling bulky.
What can I use them for?
What can I use them for?
while absorbencies vary, they're perfect for periods, light bladder leaks, discharge, postpartum recovery, and even sweat. Whether you're sleeping, exercising, or on the go—they’ve got you covered.
How much can they hold?
How much can they hold?
Our knickers can absorb up to 2–4 tampons’ worth, depending on the style. Check each product description for exact absorbency levels to find your perfect match.
When do I need to change them?
When do I need to change them?
It depends on your flow or level of leaks. Most ShineSisters can be worn for up to 8–10 hours, just like a regular pair of undies. On heavier days or if you’re unsure, it’s a good idea to bring a spare pair—just like you would with pads or tampons. You’ll know it’s time to change when the gusset starts to feel damp.
Do they feel like wearing a pad?
Do they feel like wearing a pad?
Not at all. Our gusset is thin, flexible and breathable—designed to feel just like your favourite pair of knickers. Soft, comfy, and completely discreet.
How do I wash and care for them?
How do I wash and care for them?
It’s simple: rinse in cold water, then machine wash in a bag on gentle cycle with mild detergent. Line dry—no fabric softeners or dryers, please. With proper care, they’ll last for years.
Are they safe and non-toxic?
Are they safe and non-toxic?
Yes. ShineSister knickers are free from PFAS, toxic coatings, and harmful chemicals. We only use safe, tested fabrics that are gentle on sensitive skin and kind to the planet.
Do I need to wear a pad or liner?
Do I need to wear a pad or liner?
Nope! Our knickers are designed to be a complete replacement for disposables during light to moderate leaks. If you have a very heavy flow, you may prefer to pair them with a cup or tampon.
How long do they last?
How long do they last?
With the right care, your No Worry Knickers can last 2–3+ years or 100+ washes—making them a sustainable and cost-effective alternative to disposable products.
Customer Reviews
Overall rating: 4.3 / 5 from 19 reviews.
Love.them will be buying more Fantastic product 😄
The quality is poor, already stretched and have not returned to their original shape. I hate them and will not be buying anything from Shine Sister again.
Very happy with item.
Comfy fit but would personally prefer a bootleg with an invisi leg . 😊
Love the underwear particularly the comfort and the slimness of them compared to some other brands
Most sexiest underwear.. 👌🏻♥️♥️♥️
I'm a curvy girl and even tho I ordered my size the cut was small so ended up sizing to the next size up. Its comfortable and love the cool colours. Its perfect for the gym or those light sneezes or light bladder leaks.
A little too big for me but I like the cut.
Will be purchasing more undies in a few weeks or so. They are very comfortable and undetectable even under my tightest gym wear.
Fit for purpose, nice material and good colours too!
Best period undies i've found
Very comfortable, great seamless design.
Love the fit
Thank you. Great underwear and service.
Really happy with my purchase. Their not like the usual period underwear, they look and feel great on.
I’m a huge believer in customer service and to say that Jess goes over and beyond is an understatement, in fact I’m not sure what I love the best about myshinesisteter, the undies or Jess! I’ve tried two other brands of leakproof undies and as they say third time was the charm. So glad I found myshinesister, my search is over. Sincerely Eleonore