Cotton Toilet Training Undies Pants | Goose

NEW!

Tired of wrestling poo-filled undies down tiny legs? Or mopping up wee puddles because "real undies" leak everywhere?

✓ Side snaps for mess-free poo accidents (no more pulling down!)
✓ WetAware® technology lets baby feel wet (real feedback = faster learning)
✓ Hidden waterproof layer helps contain leaks

For those who want the "real undies" approach to toilet training, with less mess.


Sale price$22.99 AUD Regular price$32.99 AUD
Save 30%
Size: Medium (Size 5 - 10)
Training Undies Size Guide

MIX AND MATCH TO SAVE
Buy 6, Get 15% Off RRP | Buy 10, Get 20% Off RRP | Buy 12+, Save 30% Off RRP

"Honestly, I wish I'd found these sooner. We tried the "real undies" approach first and it was an absolute disaster HAHHAHA! Wee everywhere, and the one time my daughter did a poo accident I literally had to peel poo-covered undies down her legs while she cried and stepped in her own poo. Never again." ★★★★★

"Can't I just get the $17 three-pack from Kmart?"

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Size 2
Tiny Transitions™
Sized undies

Kmart training undies are sold in sizes 1–4. Tiny Transitions™ Small adjusts across sizes 0–5, Medium across sizes 5–10.

Kmart product details from kmart.com.au (3 Pack Training Undies $13, SKU P_S163528; 3 Pack Bluey License Training Undies $17, SKU S172518), accurate as at July 2026.

Why You'll Love Mimi

Features

Why Parents Love Tiny Transitions™ Toilet Training Undies

  • Side Snaps = Mess-Free Changes: When poo accidents happen, simply unsnap the sides and remove without dragging through legs – a total game-changer
  • WetAware® Technology: 100% cotton inner lets baby feel wet immediately, providing the feedback they need to learn (no stay-dry layer blocking their progress)
  • Hidden Waterproof Layer: Protects against wee leaks without the bulky nappy feel – your child thinks they're wearing real undies
  • Adjustable Side Sizing: Perfect fit that grows with your child through their toilet training journey
  • Premium Materials: 100% non-woven bamboo middle, 95% cotton/5% spandex inner & outer for all-day comfort
  • Two Sizes: Small (8-18kg) and Medium (18-30kg)

Why Parents Love Tiny Transitions™ Toilet Training Undies

  • Side Snaps = Mess-Free Changes: When poo accidents happen, simply unsnap the sides and remove without dragging through legs – a total game-changer
  • WetAware® Technology: 100% cotton inner lets baby feel wet immediately, providing the feedback they need to learn (no stay-dry layer blocking their progress)
  • Hidden Waterproof Layer: Protects against wee leaks without the bulky nappy feel – your child thinks they're wearing real undies
  • Adjustable Side Sizing: Perfect fit that grows with your child through their toilet training journey
  • Premium Materials: 100% non-woven bamboo middle, 95% cotton/5% spandex inner & outer for all-day comfort
  • Two Sizes: Small (8-18kg) and Medium (18-30kg)

TINYTRANSITIONS™

Feels like undies

BUNDLE & SAVE
  • 5 stars: 42 (84%)
  • 4 stars: 3 (6%)
  • 3 stars: 3 (6%)
  • 2 stars: 1 (2%)
  • 1 star: 1 (2%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
R
Rhani M. (Griffith, AU)
Brilliant

I was so impressed with these pants! My daughter is 3.5 years old hated the potty so I was unsure about jumping straight into pants. One month on… Jasmine is now comfortably using the toilet. No accidents at bedtime. And more comfortable with number 2’s.
My daughter is very picky, cautious and needs to feel in control and safe.
These pants have been a godsend

C
Charleigh P. (Sydney, AU)
New training undies

I ordered both small and medium, I had to exchange medium for the smalls which was a simple process. They do shrink slightly and after a few weeks of use the fabric bunches a lot, I just stretch them out when hanging up and that helps. They work well and will contain a poop even if your husband puts them on backwards! I've added photos of bunching and size difference between one used for a couple months and brand new. Love them and planning on buying some more!

P
Pearly (Brisbane, AU)
New training pants

I love the feel of the pants and the thinness/thickness of them is perfect. Seemed to hold a big wee (slight wetness on the leg bands) but we aren’t at toilet training stage just yet so would be perfect for those little wee accidents (or number 2s). I don’t particularly like the fully removable side panels, they sort of sit funny and maybe wish I’d gone the bigger size. They are definitely super soft and undies like and I think they’ll be great once we are right in the middle of toilet training.

A
A. (Perth, AU)
Quality

We have used our training pants a couple of times in anticipation for toilet training and as with all Mimi & Co products we own, they are exceptional quality. Holds a wee without leaking and has an optional pocket for extra absorbancy if you want to use as a pull up style nappy.

M
Mia (Sunshine Coast, AU)
Love them

My Twinnies have just started to toilet train last day of two and will definitely be getting more I’m not worried about leaks during the early stages, toilet training must be exhausting on them but even with a short nap they didn’t leak so I’m not worried about them having accidents on the lounge or carpet areas if I was not near them every second of the day

K
Kristen T.
Training pants/pull up

I love these as training pants but also boosting with other inserts to achieve a pull-up style day nappy! They are so versatile.
I will say they run a bit small in my experience around the legs so size up if you have a baby with thicker thighs!

K
Kristen T.
Training pants/pull up

I love these as training pants but also boosting with other inserts to achieve a pull-up style day nappy! They are so versatile.
I will say they run a bit small in my experience around the legs so size up if you have a baby with thicker thighs!

C
C R. (Canberra, AU)
It’s so hard to find good toilet training undies

It’s so hard to find good toilet training undies for small kids! My toddler is only 14kg and the only options never had the side snaps to be able to easily fix a poo accident! I always had to choose one or the other :( but the small size is perfect for her - it think we use around the middle setting, so still heaps on room to grow :)

E
Emily (Perth, AU)
Nice but not at all worth the price

Kmart in Australia have the same thing 3 for $6. The only difference is these have the clips to the side which are helpful for any number two accidents but these don’t change the absorbency compared with the cheaper ones at all. It is exactly the same as the cheaper ones. Kmart also have Bluey characters. This is a bummer. A terry cloth inside with plastic between the outer and inner layers would actually make a difference and be worth the price. $70 for two pair including shipping and that was on special heavily discounted.

Hi Emily,

Thank you for taking the time to share your feedback, and I’m sorry the undies didn’t meet your expectations.

I did want to clarify a few things, as some of the details in your review aren’t quite accurate.

Our Cotton Toilet Training Undies do contain a waterproof TPU layer positioned between the outer fabric and the inner absorbent layers, which is exactly the construction you mentioned would make a difference.

The absorbent core is also made from 100% bamboo, chosen for its superior absorbency compared to standard cotton or bamboo terry, with cotton on the outer of the insert and our WetAware fabric on the inside :)

Please note we have no affiliation with Kmart, their manufacturers or ethics, and our undies are not the same product - nor could I find any safety certification or testing on their training undies.

We genuinely want every family to feel their purchase was worthwhile.

If you felt your undies weren't performing as they should, you can reach out at any time to our team at support@mimiandco.com.au and we’d be happy to troubleshoot with you, as fit and washing routine can make a big difference to performance.

Warm regards
Mimi & Co

T
Tahnee (Perth, AU)
Gum Bum 🌱

We LOVE this gorgeous design. We got a few different varieties and my child picks this print every morning. They hold allot of liquid for my 3yo who’s toilet training. ☺️

T
Tamara A. (Bellmere, AU)
Great Toilet Training Pants

I just wanted to share how happy I am with the training pants from Mimi & Co. They’ve worked wonderfully for my son’s toilet training, and the quality is fantastic.

These training pants have really helped my son become more aware of when he needs to go. If he starts to go a little bit, he can feel the wetness, which gives us time to get to the toilet. With nappies, he just couldn’t tell, so this has made a big difference.

The customer service team was incredibly kind and helpful throughout the process. We did have a minor issue with the postage, but they were quick to respond and sorted everything out promptly. Highly recommend!

J
JW (Perth, AU)
Mixed feeling. Pros and cons to an adjustable training pants

I like the idea of it being adjustable so we can use it for a long time. More value for money. But I find it harder to put on than other non adjustable training pants. Because of there the buttons and flap sits, pulling it up and down multiple times a day during toilet training is annoying. But I do like it that if there's poo, its easier to take off. Also find the design for boys more limited. Like my boy will prefer dinosaurs, cars or trucks etc.

H
Hailey M.
Amazing training pants for EC

High quality, cute prints, easy to wash and fast drying. These fit my 8 month old and are great for elimination communication.

L
Leah d. (Melbourne, AU)
Great besides shrinking

I love the training undies for their functionality and cute patterns, the fit straight out of the box is great but unfortunately they’ve shrunk considerably, to the point where they’re actually challenging to get over my 13 month olds little toosh. Hopefully this can be addressed in future runs

F
Fran (Melbourne, AU)
Not a fan of the sides

I have other toilet training undies so I am able to compare. There's too many snaps. I prefer no snaps but just elastic sides. Also, the absorbent part needs to be higher/longer a bit. It didn't catch much for a boy (front part). Cute print though.

Thank you for the honest feedback and glad you love the print!

The snap sides are actually one of our most deliberate design decisions - when there's a poo accident, snap-off sides mean you can remove the undies without pulling them down over the ankles (and risking little feet stepping in the mess - we've all been there!).

Once you've had that happen a few times it's a total game changer. That said, we completely get that it's an adjustment if you're used to elastic-only sides.

Your feedback on the absorbency placement for boys is really helpful and something we'll take on board - thank you for taking the time to share it!

C
Christina F. (Brisbane, AU)

Toilet Training Undies Pants [March Preorder]

A
Anonymous (Canberra, AU)
OMG

I got a pair of each size - the medium fits my 7yo ASD babe (about 28kg) perfectly and it great for her to use at school - you wouldnt veen know she has that extra protection when needed! & the small fits my little 5yo (maybe 16kg) on the middle setting just like undies! where were these 15 years ago?!

M
Mary

Was too small and tight. Didn’t like how thick it was.

K
Kelsey H. (Sheffield, GB)
Training pants

Definitely recommend these are brilliant for potty training my son had no interest until he saw his big boy pants. These are really quick get off and to clean if an accident happens. The snaps allow to get a good fit and my boy can pull them up and down by himself.

K
Kelsey H. (Derby, GB)
Training pants

Definitely recommend these are brilliant for potty training my son had no interest until he saw his big boy pants. These are really quick get off and to clean if an accident happens. The snaps allow to get a good fit and my boy can pull them up and down by himself.

J
J. (Sydney, AU)
Absolutely amazing!

The TinyTransition Training Pants are amazing! I've tried a few other MCN brands, but Mimi & Co is the only brand my toddler will wear as they are just so comfortable. The quality is great and the Bonnie pattern is absolutely stunning. My only issue is that I didn't purchase more!

J
J.N (Sydney, AU)
Absolutely amazing!

The TinyTransition Training Pants are amazing! I've tried a few other MCN brands, but Mimi & Co is the only brand my toddler will wear as they are just so comfortable. The quality is great and the Bonnie pattern is absolutely stunning. My only issue is that I didn't purchase more!

J
J.N
Absolutely amazing!

The TinyTransition Training Pants are amazing! I've tried a few other MCN brands, but Mimi & Co is the only brand my toddler will wear as they are just so comfortable. The quality is great and the Bonnie pattern is absolutely stunning. My only issue is that I didn't purchase more!

J
J.N
Absolutely amazing!

The TinyTransition Training Pants are amazing! I've tried a few other MCN brands, but Mimi & Co is the only brand my toddler will wear as they are just so comfortable. The quality is great and the Bonnie pattern is absolutely stunning. My only issue is that I didn't purchase more!

K
Kelsey H. (Wednesbury, GB)
100% Recommended

I absolutely love these training pants, they are exactly what I was looking for. They give a great fit with all the snaps. The side snaps are an absolute life saver and the built-in absorbancy is enough to hold a small wee (once up to full absorbancy) I also love that you can add absorbancy as and when needed with the pocket at the back. My son is comfortable and has made a massive improvement since he started to wear these training pants and he can pull them up and down by himself as they are stretchy around the waist. I can honestly say these are the best training pants we have brought I 100% recommend to everyone!

K
Kelsey H. (West Bromwich, GB)
100% Recommended

I absolutely love these training pants, they are exactly what I was looking for. They give a great fit with all the snaps. The side snaps are an absolute life saver and the built-in absorbancy is enough to hold a small wee (once up to full absorbancy) I also love that you can add absorbancy as and when needed with the pocket at the back. My son is comfortable and has made a massive improvement since he started to wear these training pants and he can pull them up and down by himself as they are stretchy around the waist. I can honestly say these are the best training pants we have brought I 100% recommend to everyone!

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