The core of the latex mattress is what gives the mattress form, shape, and definition. Without a proper core, there is no latex mattress. Currently there are two manufacturing techniques used for making latex mattress cores. They are Talalay and Dunlop. Dunlop mattresses are firmer and denser than Talalay mattresses, while the Talalay mattresses are softer and not quite as supportive. These differences are the direct results of the mattresses’ manufacturing by latex mattress manufacturers.