Rocha Fernandes Furniture, 2018-01-07 02:44:05. Natural memory foam mattresses are made from natural latex as opposed to either synthetic or a blend of natural and synthetic content. Natural latex foam comes from rubber tree sap that has been frothed up and baked. It is so appealing because it is healthy, has a life-span of 20 plus years and maintains its consistency, unlike synthetics which dry out and break down. Natural memory foam mattresses contain organic fill or batting. This is what is inside a mattress over the springs or latex foam. Organic cotton or wool are batting you will find in a natural or healthy mattress. Most natural mattresses are quite firm. Natural latex is a fairly firm rubbery foam. Fibres soften the surface of a spring or natural latex mattress. By topping the mattress, it helps provide a more comfortable nights sleep.