Memory foam layer: With an 8mm memory foam layer that contours to your body shape and offers full head to toe anatomical support. Mattress: Treat yourself to the perfect night's sleep with a Cool Blue gel memory sprung mattress. Sprung: Supported by a system of long life bonnell springs. Features: Hypoallergenic with a quilted cover. Thickness: Choose a 6" or 10" thickness. Sizes: Small Single, Single, Small Double, Double, King or Super King. Cool Blue Memory Spring Mattress | Single | Living Social