1.Material: ripstop and waterproof 600D polyester 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 6.2 main compartments, and one roomy front pocket 7.Large front-load main compartment for clothes or books 8.Zippered front accessory pocket with organizer 9.Padded backpack straps stored behind fabric panel which folds down to cover wheels