Ultra lightweight polycarbonate shells offer high impact protection Unique patent protected expansion section adds up to 25% additional packing capacity when needed Stylish curved internal aluminum handle system with transparent push-button locking top handle Curved handle system reduces arm stress when rolling Corner transparent ball bearing wheels for stability Soft rubber top and side handles for extra comfort #10 interlocking zippers on main compartment Top mounted Add-a-Bag strap carries an additional bag with ease Luggage tag included on each case Fully lined interior with packing divider and organizer pockets Great size for 4-7 day trips