[Heavy-duty] The Mac Sports Diamond Rocker features heavy-duty polyester fabric on a strong powder-coated steel frame and a well-padded seat and back for greater comfort. [Springs-less technology] The Patented springs-less technology provides a smooth and effortless rocking motion. [Easy setup & Portable] It is perfect for any outdoor use where additional seating is required. It opens and folds in a snap. No assembly required.