McKlein Nylon Detachable 18" Wheeled Backpack - 70783 Exclusive to McKleinUSA! Patented 2-in-1 Detachable Wheel and Handle System Front zipper pocket for small miscellaneous items Front organizer pocket for media devices, cell phone, business cards, key holder and pens Front compartment with accessory pockets for larger devices Middle compartment padded to protect laptops up to 17 in size Back compartment features file divider for documents Detachable cell phone or MP3 player case included Dual Laptop Protection System uses a high-tech ABS honeycomb frame to protect laptop from exterior impact and a 10mm high-density foam to help absorb shock Bonus! Protective Weatherproof Cover