Stanley's outdoor furniture is crafted using only the very highest grade of poly lumber (High Density Polyethylene, or HDPE). The density and smoothness ofStanley's outdoor patio furniture is far superior than that of similar patio furniture due to extremely high quality control standards and special agreements between Stanley and our suppliers. This means no voids on the cut edges or rough, discolored surfaces on your fine piece of furniture. Made of nearly 100% recycled milk jugs, poly lumber offers many advantages over other materials used in outdoor furniture.