These materials that a can take a beating and still look good. Patio and outdoor furniture are organized by materials: Resin, Aluminum, Bamboo, Cast Aluminum, Cedar, Concrete, Recycled Plastic, Stainless Steel, Teak, Wood and Wrought Iron. Teak is fantastic because of its natural abundance of oils that keep rot and bugs away. With their classic design, Adirondack chairs are popular for outdoor furniture. Adirondack chairs have rounded backs and wide, flat armrests.