Made of 900D Polyester, it's a backpack, computer case, carry-on, and sample case all in one! A built-in, padded computer sleeve and unique molded bottom protect your computer. A main zip compartment in front contains pockets for CDs, disks, wire, calculator, pens, keys, etc. Additional pockets for stationary, battery, phone, etc. In-line skate wheels and sturdy pull-up handle complete this combination case!