The comfortably casual Adirondack porch swing is perfect for relaxing and environmentally friendly, too. EnviroWood is made from recycled plastics formed into plastic lumber made of HDPE (high density polyethylene). It is a dense material, which is heavier than wood, but HDPE should not be confused with resin and other plastics that oxidize and become brittle over time. Choose from a variety of colors as well as fabrics for the optional cushions. Coordinate a complete outdoor living area with many different pieces to suit your needs and style.