1.Material: 600D polyester ripstop and waterproof 2.Self-locking 3-section retractable rectangular handle system 3.In-line skate wheel system 4.Padded wheel cover system with a shoulder strap 5.Bottom reinforced with thick tray for better balance 6.Two main compartments, one front pockets and two side mesh pockets 7.Large top-load main compartment holds clothes or books 8.Zippered front accessory pocket with organizer 9.Padded backpack straps stored behind fabric panel which folds down to cover wheels