Lightweight ripstop construction. Expands 5 inches for additional packing space. Telescoping, stow-away, push-button trolley handle system. In-line skate wheels for smooth rolling. Detachable piggy-back strap. Interior tie-down straps. Top, side and bottom carry handles. Protective bumpers on bottom. Heavy duty zippers. Meets most domestic and international airline carry on requirements. AE-31W Features: -Key and Lock included. -Super lightweight. -Extra strong T26 handle system. -Handle system retracts into a zipper pocket. -Inline-skate wheel system. -Interior tie straps. Exterior Color: -Black. Exterior Material: -Nylon. Hardware Material: -Aluminum. Lockable: -Yes. Dimensions: Overall Height - Top to Bottom: -14". Overall Width - Side to Side: -31". Overall Depth - Front to Back: -17.5". Overall Product Weight: -7.5 lbs.