* FEATURING: A contemporary carbon steel frame, a seat and back with heavy-duty inner liner * BUILT TO LAST: Built with a carbon steel frame that offers a high strength light weight option * Universal tires: solid-free tires, material wear-resistant and durable, shock absorption. * Aluminum alloy frame: aluminum alloy material, light weight, corrosion resistance, tensile, resistance, and durability. * Lightweight folding: easy folding of ultra portable, handful, small, light weight, very convenient, easy travel is not tired.