Find the answers to all your questions here. If you can't find the solution you're looking for, please contact us via the form below.


There is a sizing guide on each product page.

We recommend choosing your size based on the size of your pants. Match your waist measurement to the relevant size of Debriefs in the chart on the product pages.

If you're in between sizes, we recommend sizing up.

If you’re still unsure of what size to buy, please email us at help@debriefs.com.au so we can ensure you get the perfect fit.

To ensure the longevity of your Debriefs, machine wash them on cold and delicate, and tumble dry with low heat. Do not iron, bleach or dry clean.

This will help to protect the soft MicroModal fibres and overall construction of the garment.

When in doubt, follow the washing instructions printed on the inside back panel of your Debriefs.

Debriefs are 94% MicroModal and 6% Elastane. The MicroModal is what gives Debriefs that soft, silky feel, and the Elastane provides the right amount of stretch to ensure they hug your body effortlessly.

We’ve gone to great lengths to ensure we work with sustainable and natural materials where ever we can. We’re committed to sustainability and doing our bit to preserve the environment.

Our MicroModal begins in Austria, where our partner Lenzing extracts pulp from rejuvenated Beechwood trees. In addition to being resistant to pests and environmental threats, beechwood trees do not need the chemicals used to protect cotton from insects.

This pulp is then processed into a fibre and spun into yarns. 95% of the resources used in this process are collected and repurposed.

We then send the fabric to our factory in Turkey, which operates on solar power and is certified by the Global Organic Textiles Standard. They also plant 1,000 trees every year to offset their carbon footprint.

This is where Debriefs are sewn into the final product, which we then ship to you using 100% biodegradable mailing satchels.

Shipping & Returns

Orders are processed within 1-2 business from confirmation. Australian orders are shipped via Couriers Please or Australia Post depending on your location.

Estimated delivery time is 1-3 business days for metro areas, and 2-6 business days for rural areas.

All international orders are shipped via Australia Post and are estimated to arrive within 3-10 business days.

Tracking information is provided for all orders upon shipment.

Express shipping is available for all orders at an additional fee.

All orders are shipped from Sydney, Australia.

Shipping is free for all Australian orders.

Express shipping within Australia is available for $9.95

For shipping to New Zealand, USA and Canada, shipping is a flat rate of $15.

For all other international orders, there is a flat rate of $20.


Everything is shipped from our warehouse in Sydney, Australia.

Depending on your shipping location, your order may be subject to import taxes or other fees charged by your local customs.

Returns are accepted within 30 days of delivery if they are unworn, unwashed, and in their original packaging.

To submit a return, please visit the returns page.

For first pair guarantee requests, please complete the same form on the returns page and select "first pair guarantee" when asked.


When you sign up to a Debriefs subscription, you'll receive a fresh pair of undies every 1, 2 or 3 months for only $24. That's a saving of 23% off the standard price.

This allows you to gradually upgrade your top drawer with the softest, comfiest undies, without hurting your back pocket.

You'll also receive exclusive first access to the newest colours when they are released.

You're never locked in and you'll have full control over your subscription. Meaning you can switch plans, skip a month, or cancel at any time.

If you would like to cancel your monthly subscription, simply login to your account and head to the subscription section.

From there you will find an option to “manage my subscription” where you can unsubscribe.

Yes of course! A subscription is a great gift for a loved one.

The best way to gift a membership is to create an account for the giftee, set the billing address to yourself and then set the shipping address to them.

You will maintain full control over the subscription for its duration, unless you choose to transfer ownership to them.

You'll be charged for your subscription on the same day you signed up every 1, 2 or 3 months, depending on your selection.

If we can’t process payment on that day, we will try again the next day and notify you if payment is still unsuccessful.

If you wish to change the day that you receive your Debriefs each month, you can do so in the subscription section of your account.

Free shipping

For all orders in Australia. International shipping is available at a flat rate