The Flexcell 500 Quilted from Breasley is made using a base layer of castellated reflex foam which is 15cm deep finished with a top 5cm layer of memory foam. Memory foam is a slow recovery foam that moulds to the contour of your body. Supportive and great for your spine memory foam has revolutionised mattress manufacture. The mattress quilted cover is the real icing on the cake, soft to the touch and washable. The total depth of the Flexcell 500 mattresses is 20cm. The memory foam density in this mattress is 55kg/m which is a high quality memory foam.