Antec, like most other manufacturers nowadays, ships the ONE in a plain brown cardboard package with a simple image of the case itself on the front and a blow-up diagram on the rear, along with some specifications. Both sides hold additional images of the case.
The case is held in place by to fairly compact foam spacers and protected from smudges and fingerprints by a thin plastic bag. All this is quite adequate for a chassis of this price range.
While we did not receive contents with the unit in our preview, you will receive five pair of drive rails, a few zip ties, screws and a USB 3.0 to 2.0 adapter, along with a manual when purchasing the Antec ONE.