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We care about how our products are made and what they’re made of.

That’s why we’ve partnered with Specortex who have engineered our undies fabric from recycled PET (polyethylene terephthalate). Taking soda and water bottles and transforming them into high performance polyester fibre.

With over a million single use plastic bottles being discarded every minute, most ending up in landfill, or worse, in our oceans, at smartass undies we’re committed to being part of the solution.

We choose to source sustainable materials because we choose to have a cleaner planet and business.

We’re committed to turning a problem into a solution.

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Jacky Wong

(yes, with a name like that he should be in action movies) Director of Specortex has a strong commitment to reducing environmental impact and being socially responsible. The man has a big heart and he’s got our back.

Specortex takes recycled PET yarn and weaves their magic to engineer our high performance sustainable fabric.

Our socks are made from certified organic cotton.

Our products are made in modern well-equipped factories where staff have safe and fair working conditions. Our suppliers have certificates for environmental and workplace safety standards and undergo regular external auditing.

We source packaging that is made from recycled as well as biodegradable materials.

We choose to work with suppliers and services that share our values and believe in our cause, because relationships matter, and life is too short to do otherwise


Seriously the most comfy undies I have worn. Love that the packaging is biodegradable and the undies are made from recycled materials. So every morning I get the reminder of ‘KINDNESS’, to ‘NEVER QUIT’ to ‘MEDITATE’, and that ‘HAPPINESS IS A CHOICE’. How great is that, highly recommend every part of smartass undies from the order to arrival and wearing.

Adelaide, Australia

Very comfortable undies , easy to wear. A good idea that it feels natural with recyclable material.

Selestat France

I love that these smartass undies are super soft and comfortable! They fit snug on my body and I can’t believe that they are made out of recycled plastic bottles! I am all about being eco-conscious as possible and I love the fact that this company is eco-friendly on all levels! Plus, the motivational messages are hilarious and keeps me uplifted when I’m wearing or not wearing and just seeing it in my drawers!

Los Angeles, California United States of America

I like the smartass undies because they are comfortable to wear with a good fit.
And especially the message behind about a smile, that cost nothing butt brings much reward.

Copenhagen, Denmark

The motivational messages on my undies are always helpful and uplifting especially on the busiest and stressful times of the day.

Darwin, Australia

Love my smartass undies!! love them so much because the material is breathable and so comfortable that i had to check to see if i still had them on. i am going to buy more asap!!

Darwin, Australia

Awesome jocks! Love the vision, design, the feel, and the fact they are made with renewables.

South Golden Beach, Australia

A great pair of comfortable underwear that fit and wear well. They dry super fast after washing so great for hiking and camping. The procrastination quote keeps me getting shit done on a daily basis and a smile on my dial. They make a great gift idea.

Keerrong, Australia

Comfy underwear with attitude! Who would have thought you could turn to your underwear for inspiration and motivation. Well that is exactly what you get when you put on your smartass undies. A quirky reminder that the power of positivity is fundamental to your health and well-being.

Byron Bay, Australia

Hi, I received my smartness undies, a pair of stylish, comfortable black underpants, with a fun message on my backside, printed in white so it stands out. Pity it can’t be seen when I am wearing pant over the top.

Rockhampton, Australia

Keep in touch

We trust you’ll enjoy wearing our smartass undies. We love to hear how the messages people choose have an impact on their day. Share your story, and or post a pic, let's motivate the world to act and be a little smarter every day.