This expandable suitcase is designed with a Lever Lock System™ that allows you to pack more while still enjoying the rigid structure and durability of aluminum.Closure: The two-way zip-around closure features a low-profile integrated TSA-approved lock with a three-digit combination dial for extra security. Tumi's patented Omega Closure System® reduces the risk of damage to the zipper and is designed to break away from the bag if it becomes caught, so the puller—rather than the entire zipper—can be quickly and easily replaced.Exterior features: Tumi's patent-pending DuraFold™ construction method folds and reinforces the corners of hardside cases with heavy-duty stitching and impact-resistant caps that provide superior corner strength and impact resistance for long-lasting use. Four recessed, 360º-swiveling, easy-to-maneuver wheels offer multidirectional navigation through busy airport terminals.Interior features: A tie-down compression strap helps you pack it all in while a hanger bracket and plenty of zip pockets help keep your belongings effortlessly organized.Special features: Tumi Tracer® is an exclusive, complimentary program that helps reunite lost or stolen bags with their rightful owners using a one-of-a-kind 20-digit number affixed to the bag. The patented X-Brace 45® handle tube system protects the telescopic handle thanks to the lightweight-yet-sturdy aircraft-grade aluminum that forms a protective, impact-absorbing structure within the case.