Alpha 2 4 Wheel International Office Carry-On Black D-2. Updated with a new four-wheel design for effortless maneuverability, this exceptionally sturdy case is both compact and expandable (2â or 5cm). Crafted from our ultra-durable FXT® ballistic nylon, it features a laptop compartment and a removable garment sleeve for short overnight stays, a multitude of organizer pockets and a removable accessory pouch.