Cover: With a hand tufted luxury damask cover with quilted border. Size: Choose single (3ft), double (4ft6) or king (5ft). Sprung mattress: Get a Bonnell spring unit mattress! Construction: With a 13.5g Bonnell spring unit for fantastic support. Firmness: Medium - ideal for those who like to sleep on their side. Bonnell Spring Unit Mattress | Living Social