Skip to main content


This underwear changes colour Shop Now

How it Works

For only $25 a month we’ll send you a fresh, poppin’ pair of undies with a never seen before design, straight to your door!

Try The Club
Legend Galah Stamp

Undies by subscription

Choose your size and style

Simply select your size and favourite underwear or bra style. Add as many as you like for $25 per pair. You can even add a kids pair for only $19.

Choose how often

First, second, third or fourth month! Monthly is our most popular and you’ll never miss a design, otherwise there’s one of the less frequent options!


Delivered right to your door with your snazzy welcome pack! Put them on, feel the power in your pants and people will start asking why you look so happy!


Experience the next surprise! On the same date the following month we’ll send our new monthly design, before it’s available to the public. You may also find a surprise included!

You’re in control

That’s right! Pause, cancel, change sizes, add styles or adjust the frequency they arrive at any time!

Try The Club

A club with benefits

Legendary savings

Save on every pair and score bloody amazing discounts on special edition ranges.

Free shipping

No worries, this one’s on us within Australia. We also ship to NZ, USA, UK and Canada.

First in best dressed

Guaranteed to get into our new designs before they’re available to the public or sold out

Free surprises

We’ll often include some extra goodies to match your undies. Shhhh, for members only!

Try The Club

New design every month!

Here’s a few of our favourites

Sex Panther

Men's Trunk

March 2021

Miami Splice

Women's Cheeky Bikini

December 2021


Women's Bralette

October 2021

Some of our most commonly asked questions

I'm the nervous type. Can I try a pair first?

Of course! You can purchase single pairs of previous designs (or special editions) in our online store for $29. Or, you can simply join the club for only $25 and cancel after your first pair if it’s not for you. That way you're guaranteed the new design!

Can I choose the design?

Nope! The Undie Club is built on the experience of a surprise. Not knowing what the design is you’re going to receive is half the fun. If you’re not a fan of surprises, you may prefer to take a look for the designs you like in our online store.

What’s the material?

All underwear uses our trademarked HyperMesh which is a blend of poly and spandex. The men’s are lined with HyperChill, a moisture wicking fabric.

Where are they packaged and dispatched?

Each Knobby is hand prepared, packaged and dispatched from our new facility on the Sunshine Coast in Queensland, Australia.

I love discount codes! Do you have any?

You cheeky bugger. Use code IMREADY for a sneaky $5 off your first month. But keep that one to yourself.

Do you sell them in stores?

Knobbys are exclusively sold right here on our website. It allows us to control and remain accountable that you receive a brilliant experience every single order.

What’s the weather like at Knobby HQ today?

Glad you asked… check it right here!