Memory foam layer: With an 8mm memory foam layer that contours to your body shape, provides support and relieves pressure points. Mattress: Sleep easy with a Cool Blue gel memory sprung mattress with 6" or 10" thickness. Features: Hypoallergenic with a quilted cover. Design: Featuring a black border. Sprung: Long life 13.5 open coil spring. Sizes: Choose from Small Single, Single, Small Double, Double, King and Super King. | Black Border Cool Blue Gel Memory Spring Mattress - Single | Wowcher