The front bay covers are made from honeycomb mesh to help with the air flow in the case. The I/O area is on the front panel will make it easily accessible to the user when needed. The I/O panel sports two USB 3.0 connections as well as the Audio in-and-out plugins. The side panel bulges out and has an optional 120mm fan to blow fresh air directly on your hardware, if you feel the extra cooling is needed.
The back of the One comes with the pretty standard layout with the 120mm exhaust fan, and the two precut holes for routing wires and tubing in and out of the case.
As mentioned above, the I/O panel sports two USB 3.0 connections, as well as the Audio in-and-out plugins. You will also find the power and reset buttons here as well. The USB 3.0 connections have an internal header, and Antec has added a USB 3.0 to 2.0 adapter for those who do not yet have USB 3.0 on their motherboards.