Part of the premium back care collection the vogue sterling star orthopedic divan set is perfect for those who require a firm bed but with quality hypo allergenic fillings and the finest fabrics the mattress is sculpture quilted and upholstered in the finest cotton fabric all beds incorporate a firm 125 orthopaedic spring unit enclosed in a 6 gauge rod edge frame for that extra support all divan bases are fully upholstered with twin castors and linking barsdimensions bull single w 90