You tried what? What code? When you go through checkout, on the shipping page you will get the following message: Crocs is doing a wall to wall inventory from December 31st – January 8th. During this time we are unable to ship any orders. We will resume shipping on the 9th, and all orders will be shipped out in the order they were received. Because of this inconvenience all ground shipping will be complimentary. We appreciate your understanding.