Ricardo Beverly Hills Melrose 22" Expandable Wheelaboard, Multi, One Size RBH Nano-Tex treated fabric utilizes nanotechnology to provide superior protection against stains and outdoor elements. Fly-weight polypropylene honeycomb Flex Frame; built for strength Aircraft grade aluminum retractable handle with lock up and lock down Color-matched reversed nylon zippers; zipper pulls have an ergonomic design with locking sliders on main compartment Limited Lifetime Warranty