Check out a selection of the newest Shop items on Sale…

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…or click on the Underwear menu item to browse the shop’s categories. Alternatively, use the Search icon on the Navigation bar to search by Brand or product code.

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Shipping & Delivery

Orders are processed on the same working day, Monday to Saturday, provided the order receipt is before 3 pm weekdays or 11 am on Saturdays.

We ship domestic orders via economy mail service and international orders via standard mail service. Priority, tracked or signed shipping options are available at checkout at an additional cost.

We offer the cheapest possible shipping rates by default. To achieve this, we opt to flat-pack orders and (in some cases) omit to ship the product carton boxes. We do this also to minimise the impact on our environment.

If your order is a “Gift”, contact us to let us know. We will ship your order in retail format if requested.

If you have any shipping queries, please visit the shipping policy page. For all other enquiries, contact us.

Payment Methods

For security we employ payment processing via established and trusted payment gateways such as PayPal | Stripe | and Alipay.

This approach ensures we do not handle or store payment details directly on the website. Payment authorisation is redirected securely to the selected payment processors portal, where customer authentication and payment authorisation occur.

We accept most major Credit and Debit cards via the Stripe or PayPal payment options. Apple and Google Pay options are available via the Stripe checkout method. We also offer the Pay in 3 option via the PayPal checkout method named “Pay Later”.

All communications between the customer, the website and payment gateways utilise SSL encryption. Buy with confidence!

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Welcome to GKAuthentic!


Up to 50% Off on Underwear..

..and Buy 2 Get 1 Free on T-shirts and Socks!