PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
PERFECT FIT GUARANTEE
FREE SHIPPING OVER $99AUD
LOVED BY 15,000+ WOMEN
Spend $99 more to get FREE shipping!
Super Absorbency
Up to 10 Hours of Protection
100% Leak-proof Design
Soft Breathable Cotton
Reusable, Reliable 100+ Washes
Perfect Fit Guarantee
⏳ LOW STOCK - SELLING FAST
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For ultimate protection, the Betty Boxer features a 4-layer leak-proof design that provides full coverage from front to back, making them the most absorbent style in our range. Perfect for heavy days, overnights, or mild incontinence, these boxers offer secure, confident wear with moisture-wicking and odour-locking properties. Machine washable for easy care, they’re your go-to for reliable, leak-proof comfort day or night.
Made with:
Outer: 95% cotton / 5% spandex
Inner: 95% cotton / 5 spandex / 80% polyester / 20% nylon / breathable TPU
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.
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.
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!
Absorbs liquid, wicking away in seconds, leaving them dry to the touch.
Absorbs and locks in moisture and odours
Breathable and non toxic TPU membrane
Dry, breathable, soft, stretchy and look just like regular knickers.
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 |
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
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.
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.
Advanced leak-proof technology that delivers protection day and night. Just pop them on and go!
Reusable, eco-conscious, and free from harmful chemicals. Better for you, and better for the planet.
Flattering fits, and all-day wearability, because comfort and style shouldn’t stop at support.
If your first pair isn’t the perfect fit, we’ll refund or replace it, no fuss, just support you can trust.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Overall rating: 4.4 / 5 from 37 reviews.
These are perfect for me, I get urge incontinence and sometimes can’t hold all the way to the toilet, the protective area goes all the way up the back so If Im leaking as I get my pants off it’s still being caught. Life changes really, now I just need more.
Honestly the best period undies I’ve ever tried, and I’ve tried a few. So comfy & you feel safe in them. I need more, I want to wear them everyday 😂
I brought these for my girlfriend, she’s been wanting some for a while. I know she’s going to love them they look and feel great.
I was so happy when my boxers arrived, they are so comfortable, soft and stretchy, but most importantly they are really absorbent, I can wear these all day or night and don’t have to worry about leaking.
great
They are bulky under clothing. I wouldn't buy these again. Otherwise the fabric feels good on the skin.
They are very comfortable except the couch can feel a bit bulky at times . Wonder why it’s not stitched like the other types of undies
They are very comfortable to wear . I find they don’t give a the confidence to wear them out as I don’t think there is enough leakage coverage especially in the front.
I received the wrong size
Same as underwear bulky and irritates me. Sorry not worth the money and not what I expected have gone back to pads
I find this style comfortable, but should have bought a smaller size.
Very comfortable
I found it very comfortable, and it lived up to all the claims. I have since bought more. An added bonus is being able to walk past the bladder incontinence aisle in the supermarket.
These are the first pair of pants I'm comfortable wearing as there is no side leaking. Other pants I've got side leak and make me nervous wearing them but not these boxer pants. Love them.
These are amazing. Great fit and comfortable.
Very comfortable and I feel very "safe" wearing them. Thanks you so much
I felt they feel a bit heavy wearing them, but I'll certainly feel confident in them when I'm out. 😀
They really helped with my problems
Great product and fast delivery
Love these boxers for night time. I feel comfortable and secure.
*****
Had problems with sizing. Fix immediately. Great service great product don’t hesitate to buy. Boxer may need to be a size or two more than briefs to fit. Thanks again
Would be more comfortable with a wider waistband
