Corner-blocked frame Reversible seat and back cushions High-resiliency foam cushions wrapped in thick poly fiber Polyester upholstery Accent pillows included Pillows with feather-fiber blend Non-skid legs 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