Tumi's Alpha 2 luggage collection features cases that are lighter and stronger while offering increased packing capacity, sleeker profiles, smarter functionality and easier maneuverability. Features include: 4-wheel cases with 360 recessed wheels to provide more interior space, a lower center of gravity and stable multi-directional navigation, a patent-pending Durafold Construction method that reinforces the case frames for superior strength and longevity, impact-resistant caps that provide addiTumi Alpha 2 Short Trip Expandable 4 Wheel Packing Case-Home