Latex Mattresses are made from the sap of the rubber tree. Latex is made from processing this sap into vats through a process known as Talalay or Dunlop.
Latex Mattresses are made from a more organic source compared to Memory Foam, but there are still some chemicals used in processing the Latex and making Latex into a solid material. Many mattress manufacturers call there Latex beds, Rubber Beds. This is the best way to describe them as they are made in the same way you would make rubber items.