Club Rochelier's smart backpack is made of 600D polyester material. Small front pocket stores smaller accessories such as an iPad or cell phone, second zipper pocket holds a tablet and has classification pockets for more organized storage. The main compartment has a secure laptop pocket as well as a hidden zippered compartment with USB/Headphone ports. This bag is ideal for the business traveler or busy student, thanks to its comfortable padded backpack straps and trolley strap. Dimensions: 13.5 x 4.5 x 18 in Club Rochelier Rectangular Multi Pocket Backpack with USB Charging Port