Memory Definition 1400. The Memory Definition 1400 is a magnificent new mattress from Relyon's Memory Collection. This supremely comfortable mattress features 1400 pocket springs in the king size model. Pocket springs do a fantastic job in supporting the areas of the body that need the most support such as the neck and back. Pocket springs work independently from one another like pistons, rather than as one like a conventional spring unit. Combined with the pocket springs is a layer of memory foam. Memory foam is pressure and heat reactive which means it will mould to the contours of the body for the ultimate in support. The Memory Definition 1400 is non turn which means it only requires to be rotated from end to end to help keep the shape of the mattress. On our website is a huge selection of bed frames and divan bases that would compliment this Relyon mattress. So buy this Memory Definition 1400 Now £549.00.