Traditional bonnell spring unit. Body moulding memory foam layer for extra comfort. Soft knitted mattress cover for extra comfort. Easycare - no need to turn, simply rotate. Anti-allergy treated mattress. Divan set includes mattress and divan base. Headboard sold separately - go online, catalogue number 4AXP9. Mattress depth: 21 cm. Height: 59 cm. Single: Width 90, Length 190 cm. Double: Width 135, Length 190 cm. King size: Width 150, Length 200 cm. Rest assured the product is identical to the one advertised here.