Unbelievably lightweight graphite frame - same material used in the construction of golf clubs and tennis rackets. Main material is constructed of durable 1682 Bullet Proof T Ballistic DuPont Teflon protected nylon with EVA foam backing. Features a fully lined interior, recessed locking trolley handle made of industrial aluminum with easy access push button to lock and release (one hand operation). Protected and recessed Velocity in-line skate wheels for an easy roll and long lasting service. Two outside zippered pocket for readily needed items.