Witzman New Black Duffel Weekender Travel Backpack Shoulder Bag 2016 nylon Imported polyester lining please Notice this bag is big size: 24"X13.5"X8" Material: High quality Nylon 2 Front pockets, A top pocket for cellphone,MP3,etc; a Side big Main pocket with a laptop computer window for 12-17inch laptop,A side pocket; Biggest feature: there is a zipper pocket with hidder shoulder strap in it, you also can use this bag as a shoulder bag; And air mesh shoulder and sweat pads for comfort Another Detachable shoulder strap can be remove if you don't need