Corner-blocked frame Attached back and loose seat cushions High-quality foam cushions wrapped in poly fiber Polyester upholstery Throw pillows included Pillows with soft polyfill Exposed tapered feet 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