Constructed of 1500 D. Polyester Recessed in-line skate metal ball bearing wheel system Push button locking internal retractable handle system Expanding feature offers 25% more packing capacity Dual pockets and a zipper mesh pocket for your packing convenience Hide-away hands-free center strap is sewn into top front pocket to carry extra bag Water bottle pocket Elegantly imprinted full interior lining EVA foamed front panel