There are two types of latex foam manufacturing processes that are used to create latex mattresses — Dunlop and Talalay latex.
Dunlop involves pouring foam into molds where it is vulcanized and allowed to dry. This creates a very dense layer of foam for mattresses that is often preferred by those who suffer from back pain.
The Talalay process is a more recent manufacturing process in which the foam is whipped to generate aeration, then poured into molds and vacuum suctioned. This creates a softer foam that is preferred by people who sleep on their sides. Read more about Dunlop and Talay