Includes 4 pieces: left-arm facing sofa, wedge, armless chair and right-arm facing sofa "Left-arm" and "right-arm" describe the position of the arm when you face the piece Additional piece offers multiple configuration options Corner-blocked frame Reversible cushions High-resiliency foam cushions wrapped in poly fiber Polyester upholstery Exposed legs with faux wood finish Platform foundation system resists sagging 3x better than spring system after 20,000 testing cycles by providing more even support Smooth platform foundation maintains tight, wrinkle-free look without dips or sags that can occur over time with sinuous spring foundations