1cm of 50kg memory foam quilted in cover gently supports your neck and aligns your spine into its natural position 6cm of 60kg memory in 5 zones applying firmer memory foam to seperate contours of the body 13cm of high density foam stabilizes the memory foam outlast cover see below for details tufted and padded cover 5 year guarantee promotes good circulation a unique combination of pocket springs and foam creates a stable foundation for a great nights sleep the mattress contours to t