Definition of Resilience
Meaning of the Term as it Pertains to Mattresses
What is Resilience?
Resilience is the ability for foam to spring back into its original shape after being compressed. Resilience indicates the elasticity or "springiness" of foam by how quickly it reshapes. Mattress shoppers typically want comfort layers to have highly elastic foam, which snaps back to shape quickly and generally has a more pleasing hand.
Foam elasticity is tested by dropping a steel ball onto a foam pad and measuring how high it reaches on the rebounding bounce. Foams generally measure rebound heights between 20 and 80 percent of original drop heights. The higher the rebound percentage, the higher the foam resilience.
High resilience foam, also called HR foam, offers the best resilience. The highest grade of polyurethane foam, high resilience foam uses more complex chemicals during production and as a result offers a longer comfort life. HR foam contours well to the body and offers a higher support factor than typical visco-elastic foam. The highly elastic foam also allows the body to sink in faster than typical, slow-reacting visco-elastic foam. HR foam offers excellent motion separation, as well.