Corner-blocked frame Reversible back and seat cushions High-resiliency foam cushions wrapped in thick poly fiber Polyester upholstery Throw pillows included Pillows with feather fill 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