Memory mattress: Get a pocket sprung and memory foam mattress! Construction: With a 1000 pocket spring unit for fantastic support. Memory foam: With a one-inch layer of memory foam for enhanced comfort. Size: Choose double (4ft6), king (5ft) or superking (6ft) sizes. Firmness: Medium firm - ideal for those who like to sleep on their back. Cover: With a hand tufted luxury damask cover with quilted border and air vents. Pocket Sprung & Memory Foam Mattress | Living Social