The Roxbury 2.0 21" 4 WHL Wheelaboard is constructed from 100% Makrolon polycarbonate (PC) for lasting durability. Two layers provide additional strength compared to conventional single layer construction. Corner armor provides extra protection at critical stress points. The bottom carry handle provides additional assistance when lifting the case. Double Spinner Wheel System for 360° mobility for ease in pushing or pulling the case. The new ergonomic pull handle system is made of aircraft grade aluminum for reliability. The expandable cases increase packing capacity with the pull of a zipper. The split book style opening offers two full compartments for packing ease. The deluxe interior features mesh pockets and a suiter system to help more formal attire remain wrinkle free. Built-in TSA combination lock for piece of mind. 3-1-1 bag is included.