Patio and outdoor furniture are organized by materials: Resin, Aluminum, Bamboo, Cast Aluminum, Cedar, Concrete, Recycled Plastic, Stainless Steel, Teak, Wood and Wrought Iron. Another good thing about recycled plastic is the affordable price. Wrought iron's powder coated finish keeps it weather and rust-proof. With numerous takes on the design, Adirondack chairs come in a variety of styles. Adirondack chairs are sturdy and are made of various woods or recycled plastic.