On average, buyers can expect a foam or hybrid mattress to last 6 to 8 years if properly cared for. With all mattresses, the comfort system generally starts to break down before the support core. As a comfort layer, gel foam is not the most durable material, especially in its plusher iterations. However, regularly rotating the mattress from head to foot can delay the onset of permanent body indentations. Using a mattress protector can also help extend the lifespan by shielding the material against accidents.