Hi Nadia, Our overlay is made using the Dunlop process. We find this to be a better all round feel and support. The Tallaly feels wonderful and light but we feel is a little too soft and prefer the dunlop style of production. Our overlays are always very well received and most of the staff here choose the latex over the memory foam overlay from a comfort perspective. Please feel free to give us a call on 03 8585 6685 and we can discuss further should you have any more questions. Warm regards, Brett Parnham. 03 8585 6685.