Corner-blocked frame Reversible seat and attached back cushions High-quality foam cushions wrapped in poly fiber Polyester upholstery Exposed rail and feet with faux wood finish in matte black 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