Outdoor furniture is well utilized pieces for any deck, patio, poolside or porch. A variety of materials are used to manufacturing them. The most popular material used is treated birch or teakwood. These hardwoods are usually kiln-dried or soaked with protective dyes. They can also be left with their natural color and polished for a glossy finish. Other materials used as outdoor furniture include cast iron, powdered aluminum, natural stone, or synthetic materials including plastic and fiberglass.