The XD Design Bobby Pro Anti-theft 15 inch is the luxury brother of the famous XD Design Bobby. Both specimens feature cut-resistant polyester and hidden zippers. This gives pickpockets no chance. An addition to this Bobby Pro is the fidlock system on the shoulder strap of the backpack. This way you always have your phone and water bottle handy. The inside of the backpack has an organized interior so that you can store your belongings in a well-organized manner. Think of a separate compartment for your 15.6 inch laptop, tablet, passport and other documents. In addition, the back has a smartsleeve that you use to attach the bag to a trolley. Handy for when you go on a business trip.Note: the size of your laptop, such as 15 inch or 17.3 inch, is the size of the screen, not of your entire laptop. If the border around your screen is wide, choose a laptop compartment in a larger size to be sure. That way you know for sure that your laptop will fit.