By purchasing or receiving an HTB Swag Card, you can buy any item in stock depending on the value of the Swag Card. You can find Swag Cards of 10, 25, 50, 100 GBP value
here
. Swag Cards apply only to HTB Swag. If you have in your hands an HTB Gift Card (available for purchase
here
), you can get HTB training services, but that's another story.