There are many different qualities of patio furniture. The first thing you must know about patio furniture is you do not want something  that will rust. Aluminium is the best material for patio furniture. 10 years ago wrought iron was the material all furniture was made of, which is a poor material for outdoor furniture, because it will rust. Wood will fall apart over time and will need constant maintenance over time.You will also want something that is powder coated, because powder coating will not chip or fade over time. liquid paint will chip and fade over time, and you find your self repainting over time.