I am trying to post this agaiin since original attempt seems to have failed. If I inadvertently have posted it twice my apologies.
The website description of the Zephyr (which I recently purchased) says:
"The back of the Zephyr features a "roll-aboard" slot on the back that allows you to safely stack the Zephyr on top of roll-aboard luggage. The slot zips shut at the bottom so it can be used as a pocket when you're not using it to fit on a roll-aboard, plus there are two small pockets on either side of the slot for a cell-phone or pens."
My bag does not seem to have the small back pockets. Am I missing something or is the description inaccurate?