A very small piece (not so small) to add to you next trip or an every day bag with the function abilities to carry your work load A4 files and personal PC or your Training Gym gears used before the office?
One outside Mobile phone, Boarding pass and passport ready for your trip.
One inside phone compartment when it is not required by you with a side pocket for your favorite Pen, One Back zip compartment to secure your travel documents, One key clip on a strap to fish out your keys you do not have to look for in your business.
You can add up a little padlock on the closing System at your office or at home.
Metal fittings under the bag to protect it from wetness or scratches.
Of course any required none standard compartments or others... I could design for you to compliment your purchase at a sensible extra fee (s).