Corner-blocked frame Loose back and seat cushions High-quality foam cushions wrapped in in poly fiber Bolster pillows included Pillows with soft polyfill Polyester upholstery Metal accent legs with black 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