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Latex is a natural ingredient that comes from rubber trees in the form of a milky liquid. There are thousands of species of plants that produce different types of latex, including the Chicle tree that yields the raw material for producing the rubbery material in chewing gum.
Latex in general and Talalay latex in particular is very resilient, which is the exact opposite of visco elastic slow recovery foam. Visco elastic foam has been much ballyhooed as being the most pressure relieving surface foam for mattresses.