Latex foam has a higher elasticity or resiliency than memory foam. The result is that latex will feel more springy, and memory foam will feel more solid. Therefore, memory foam will not push back up against your body upon pressure being applied to it. Many mattress companies are using both of these two materials to blend the perfect mattress combination.
Rare allergies to latex can be triggered, but usually upon skin contact, and usually not with the natural and synthetic latex blends like Talalay. This is because the proteins thought to trigger these rare allergies are usually washed away in the Talalay latex foam produced in the U.S. Talalay latex is more supple than Dunlop latex. It is more expensive and is composed of synthetic and natural latex. Because there are no chemicals used in latex composition, it is the ILD only that determines the feel of this product.