Size: Available in 3ft, 4ft, 4ft6, 5ft and 6ft. Features: Hypo-allergenic and dust mite resistant. Product: Get a Greytex Memory spring mattress and improve the quality of your sleep in an instant! Support: 13.5 gauge open coil bonnell spring for added support. Memory Foam: Contains layers of memory foam for extra comfort. Greytex Memory Spring Mattress | Living Social