The Sealy Bonanza divan set has a mattress that has, * Sealy's Triple Offset Spring system. * Medium comfort feel. * 'Micro-Quilted' mattress * 9" Deep Mattress filled with Fibre fillings * Turning handles and Air Vents *. This is a quality starter mattress ideal for those wanting a medium support. This Sealy spring system is used in most Posturepedic bed bases, Sealy sprung bases are 50% firmer than the average Sprung base, improving support and extending the life of the mattress by up to 25%. There are also many drawer options available on the Bonanza divan base.