Ultra lightweight ABS/polycarbonate shells offer high impact protection Unique expansion section adds up to 25% additional capacity when needed Stylish curved internal aluminum handle system with push button lock top handle Curved handle system reduces arm stress when rolling Corner transparent ball bearing wheels for stability Full lined interior with packing divider and organizer pockets Stitched and padded top and side handles for extra comfort #10 interlocking zip pullers on main compartment Top mounted Add-A-Bag strap